update_engine: drop SYSROOT checks

Since unittests are run inside of the sysroot now, the specific checks
for them in the tests are pointless.  Delete all the related logic.

BUG=chromium:401872
TEST=precq passes (runs unittests)

Change-Id: I12cb5e6717718a35c0dda2510e63c7bbcfa1f470
Reviewed-on: https://chromium-review.googlesource.com/269643
Trybot-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/delta_performer_unittest.cc b/delta_performer_unittest.cc
index 4739cb2..381f777 100644
--- a/delta_performer_unittest.cc
+++ b/delta_performer_unittest.cc
@@ -231,8 +231,7 @@
   if (signature_test == kSignatureGeneratedShellBadKey) {
     LOG(INFO) << "Generating a mismatched private key.";
     ASSERT_EQ(0, System(base::StringPrintf(
-        "%s genrsa -out %s 2048",
-        utils::GetPathOnBoard("openssl").c_str(), private_key_path.c_str())));
+        "openssl genrsa -out %s 2048", private_key_path.c_str())));
   }
   int signature_size = GetSignatureSize(private_key_path);
   string hash_file;
@@ -264,8 +263,7 @@
   ScopedPathUnlinker sig_unlinker(sig_file);
   ASSERT_EQ(0,
             System(base::StringPrintf(
-                "%s rsautl -raw -sign -inkey %s -in %s -out %s",
-                utils::GetPathOnBoard("openssl").c_str(),
+                "openssl rsautl -raw -sign -inkey %s -in %s -out %s",
                 private_key_path.c_str(),
                 hash_file.c_str(),
                 sig_file.c_str())));
@@ -276,8 +274,7 @@
       signature_test == kSignatureGeneratedShellRotateCl2) {
     ASSERT_EQ(0,
               System(base::StringPrintf(
-                  "%s rsautl -raw -sign -inkey %s -in %s -out %s",
-                  utils::GetPathOnBoard("openssl").c_str(),
+                  "openssl rsautl -raw -sign -inkey %s -in %s -out %s",
                   kUnittestPrivateKey2Path,
                   hash_file.c_str(),
                   sig_file2.c_str())));