update_engine: Remove unused utils.

These functions are not currently used, and looks like they have
never been used.

BUG=chromium:368971
TEST=Unittests still pass. grep says we are not using them.

Change-Id: I2ea9878920d177529c0a504adff94303c2471565
Reviewed-on: https://chromium-review.googlesource.com/228195
Commit-Queue: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: Gilad Arnold <garnold@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
diff --git a/test_utils.cc b/test_utils.cc
index 3619e5a..251ed78 100644
--- a/test_utils.cc
+++ b/test_utils.cc
@@ -40,108 +40,6 @@
   return utils::WriteFile(path.c_str(), data.data(), data.size());
 }
 
-string Readlink(const string& path) {
-  vector<char> buf(PATH_MAX + 1);
-  ssize_t r = readlink(path.c_str(), &buf[0], buf.size());
-  if (r < 0)
-    return "";
-  CHECK_LT(r, static_cast<ssize_t>(buf.size()));
-  buf.resize(r);
-  string ret;
-  ret.insert(ret.begin(), buf.begin(), buf.end());
-  return ret;
-}
-
-vector<char> GzipCompressData(const vector<char>& data) {
-  const char fname[] = "/tmp/GzipCompressDataTemp";
-  if (!WriteFileVector(fname, data)) {
-    EXPECT_EQ(0, system((string("rm ") + fname).c_str()));
-    return vector<char>();
-  }
-  EXPECT_EQ(0, system((string("cat ") + fname + "|gzip>" +
-                       fname + ".gz").c_str()));
-  EXPECT_EQ(0, system((string("rm ") + fname).c_str()));
-  vector<char> ret;
-  EXPECT_TRUE(utils::ReadFile(string(fname) + ".gz", &ret));
-  EXPECT_EQ(0, system((string("rm ") + fname + ".gz").c_str()));
-  return ret;
-}
-
-vector<char> GenerateSampleMbr() {
-  // This is the actual MBR from my dev machine. Partition 1 (the first)
-  // is currently marked bootable
-  unsigned char mbr[512] = {
-    0xeb, 0x48, 0x90, 0x10, 0x8e, 0xd0, 0xbc, 0x00,
-    0xb0, 0xb8, 0x00, 0x00, 0x8e, 0xd8, 0x8e, 0xc0,
-    0xfb, 0xbe, 0x00, 0x7c, 0xbf, 0x00, 0x06, 0xb9,
-    0x00, 0x02, 0xf3, 0xa4, 0xea, 0x21, 0x06, 0x00,
-    0x00, 0xbe, 0xbe, 0x07, 0x38, 0x04, 0x75, 0x0b,
-    0x83, 0xc6, 0x10, 0x81, 0xfe, 0xfe, 0x07, 0x75,
-    0xf3, 0xeb, 0x16, 0xb4, 0x02, 0xb0, 0x01, 0xbb,
-    0x00, 0x7c, 0xb2, 0x80, 0x8a, 0x74, 0x03, 0x02,
-    0xff, 0x00, 0x00, 0x20, 0x01, 0x00, 0x00, 0x00,
-    0x00, 0x02, 0xfa, 0x90, 0x90, 0xf6, 0xc2, 0x80,
-    0x75, 0x02, 0xb2, 0x80, 0xea, 0x59, 0x7c, 0x00,
-    0x00, 0x31, 0xc0, 0x8e, 0xd8, 0x8e, 0xd0, 0xbc,
-    0x00, 0x20, 0xfb, 0xa0, 0x40, 0x7c, 0x3c, 0xff,
-    0x74, 0x02, 0x88, 0xc2, 0x52, 0xbe, 0x7f, 0x7d,
-    0xe8, 0x34, 0x01, 0xf6, 0xc2, 0x80, 0x74, 0x54,
-    0xb4, 0x41, 0xbb, 0xaa, 0x55, 0xcd, 0x13, 0x5a,
-    0x52, 0x72, 0x49, 0x81, 0xfb, 0x55, 0xaa, 0x75,
-    0x43, 0xa0, 0x41, 0x7c, 0x84, 0xc0, 0x75, 0x05,
-    0x83, 0xe1, 0x01, 0x74, 0x37, 0x66, 0x8b, 0x4c,
-    0x10, 0xbe, 0x05, 0x7c, 0xc6, 0x44, 0xff, 0x01,
-    0x66, 0x8b, 0x1e, 0x44, 0x7c, 0xc7, 0x04, 0x10,
-    0x00, 0xc7, 0x44, 0x02, 0x01, 0x00, 0x66, 0x89,
-    0x5c, 0x08, 0xc7, 0x44, 0x06, 0x00, 0x70, 0x66,
-    0x31, 0xc0, 0x89, 0x44, 0x04, 0x66, 0x89, 0x44,
-    0x0c, 0xb4, 0x42, 0xcd, 0x13, 0x72, 0x05, 0xbb,
-    0x00, 0x70, 0xeb, 0x7d, 0xb4, 0x08, 0xcd, 0x13,
-    0x73, 0x0a, 0xf6, 0xc2, 0x80, 0x0f, 0x84, 0xea,
-    0x00, 0xe9, 0x8d, 0x00, 0xbe, 0x05, 0x7c, 0xc6,
-    0x44, 0xff, 0x00, 0x66, 0x31, 0xc0, 0x88, 0xf0,
-    0x40, 0x66, 0x89, 0x44, 0x04, 0x31, 0xd2, 0x88,
-    0xca, 0xc1, 0xe2, 0x02, 0x88, 0xe8, 0x88, 0xf4,
-    0x40, 0x89, 0x44, 0x08, 0x31, 0xc0, 0x88, 0xd0,
-    0xc0, 0xe8, 0x02, 0x66, 0x89, 0x04, 0x66, 0xa1,
-    0x44, 0x7c, 0x66, 0x31, 0xd2, 0x66, 0xf7, 0x34,
-    0x88, 0x54, 0x0a, 0x66, 0x31, 0xd2, 0x66, 0xf7,
-    0x74, 0x04, 0x88, 0x54, 0x0b, 0x89, 0x44, 0x0c,
-    0x3b, 0x44, 0x08, 0x7d, 0x3c, 0x8a, 0x54, 0x0d,
-    0xc0, 0xe2, 0x06, 0x8a, 0x4c, 0x0a, 0xfe, 0xc1,
-    0x08, 0xd1, 0x8a, 0x6c, 0x0c, 0x5a, 0x8a, 0x74,
-    0x0b, 0xbb, 0x00, 0x70, 0x8e, 0xc3, 0x31, 0xdb,
-    0xb8, 0x01, 0x02, 0xcd, 0x13, 0x72, 0x2a, 0x8c,
-    0xc3, 0x8e, 0x06, 0x48, 0x7c, 0x60, 0x1e, 0xb9,
-    0x00, 0x01, 0x8e, 0xdb, 0x31, 0xf6, 0x31, 0xff,
-    0xfc, 0xf3, 0xa5, 0x1f, 0x61, 0xff, 0x26, 0x42,
-    0x7c, 0xbe, 0x85, 0x7d, 0xe8, 0x40, 0x00, 0xeb,
-    0x0e, 0xbe, 0x8a, 0x7d, 0xe8, 0x38, 0x00, 0xeb,
-    0x06, 0xbe, 0x94, 0x7d, 0xe8, 0x30, 0x00, 0xbe,
-    0x99, 0x7d, 0xe8, 0x2a, 0x00, 0xeb, 0xfe, 0x47,
-    0x52, 0x55, 0x42, 0x20, 0x00, 0x47, 0x65, 0x6f,
-    0x6d, 0x00, 0x48, 0x61, 0x72, 0x64, 0x20, 0x44,
-    0x69, 0x73, 0x6b, 0x00, 0x52, 0x65, 0x61, 0x64,
-    0x00, 0x20, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x00,
-    0xbb, 0x01, 0x00, 0xb4, 0x0e, 0xcd, 0x10, 0xac,
-    0x3c, 0x00, 0x75, 0xf4, 0xc3, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x50, 0xc1, 0x04, 0x00, 0x00, 0x00, 0x80, 0x01,
-    0x01, 0x00, 0x83, 0xfe, 0xff, 0xff, 0x3f, 0x00,
-    0x00, 0x00, 0x09, 0x7f, 0x32, 0x06, 0x00, 0xfe,
-    0xff, 0xff, 0x05, 0xfe, 0xff, 0xff, 0x48, 0x7f,
-    0x32, 0x06, 0x79, 0x59, 0x2d, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa
-  };
-  vector<char> ret;
-  ret.insert(ret.begin(), reinterpret_cast<char *>(mbr),
-             reinterpret_cast<char *>(mbr + sizeof(mbr)));
-  return ret;
-}
-
 // Binds provided |filename| to an unused loopback device, whose name is written
 // to the string pointed to by |lo_dev_name_p|. Returns true on success, false
 // otherwise (along with corresponding test failures), in which case the content
diff --git a/test_utils.h b/test_utils.h
index cf6cb96..73f29c6 100644
--- a/test_utils.h
+++ b/test_utils.h
@@ -31,17 +31,6 @@
 bool WriteFileVector(const std::string& path, const std::vector<char>& data);
 bool WriteFileString(const std::string& path, const std::string& data);
 
-// Reads a symlink from disk. Returns empty string on failure.
-std::string Readlink(const std::string& path);
-
-// Gzip compresses the data passed using the gzip command line program.
-// Returns compressed data back.
-std::vector<char> GzipCompressData(const std::vector<char>& data);
-
-// Gives back a 512-bytes length array that contains an MBR with
-// the first partition is marked bootable.
-std::vector<char> GenerateSampleMbr();
-
 bool BindToUnusedLoopDevice(const std::string &filename,
                             std::string* lo_dev_name_ptr);
 
diff --git a/utils.cc b/utils.cc
index eb4ccd2..33df1b5 100644
--- a/utils.cc
+++ b/utils.cc
@@ -820,12 +820,6 @@
   return "data";
 }
 
-bool GetBootloader(BootLoader* out_bootloader) {
-  // For now, hardcode to syslinux.
-  *out_bootloader = BootLoader_SYSLINUX;
-  return true;
-}
-
 namespace {
 // Do the actual trigger. We do it as a main-loop callback to (try to) get a
 // consistent stack trace.
diff --git a/utils.h b/utils.h
index f9b3c28..56bd22e 100644
--- a/utils.h
+++ b/utils.h
@@ -223,14 +223,6 @@
 // Returns a string representation of the given enum.
 std::string ToString(PayloadType payload_type);
 
-enum BootLoader {
-  BootLoader_SYSLINUX = 0,
-  BootLoader_CHROME_FIRMWARE = 1
-};
-// Detects which bootloader this system uses and returns it via the out
-// param. Returns true on success.
-bool GetBootloader(BootLoader* out_bootloader);
-
 // Schedules a Main Loop callback to trigger the crash reporter to perform an
 // upload as if this process had crashed.
 void ScheduleCrashReporterUpload();