Revert "Fix CFI initialization crash on x86."

This reverts commit be46d3871c91902504e5ec4c7f575c86f647aafc.

Reverting due to broken build:

https://android-build.googleplex.com/builds/branch-dashboard/aosp-master?build_id=3687823

Change-Id: I30968398edd9a094fce878839ba0a002ed487a77
diff --git a/tests/utils.h b/tests/utils.h
index 0b9b886..79eed10 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -125,13 +125,8 @@
 static inline void AssertChildExited(int pid, int expected_exit_status) {
   int status;
   ASSERT_EQ(pid, waitpid(pid, &status, 0));
-  if (expected_exit_status >= 0) {
-    ASSERT_TRUE(WIFEXITED(status));
-    ASSERT_EQ(expected_exit_status, WEXITSTATUS(status));
-  } else {
-    ASSERT_TRUE(WIFSIGNALED(status));
-    ASSERT_EQ(-expected_exit_status, WTERMSIG(status));
-  }
+  ASSERT_TRUE(WIFEXITED(status));
+  ASSERT_EQ(expected_exit_status, WEXITSTATUS(status));
 }
 
 // The absolute path to the executable
@@ -147,59 +142,4 @@
 char** get_argv();
 char** get_envp();
 
-class ExecTestHelper {
- public:
-  char** GetArgs() {
-    return const_cast<char**>(args_.data());
-  }
-  char** GetEnv() {
-    return const_cast<char**>(env_.data());
-  }
-
-  void SetArgs(const std::vector<const char*> args) {
-    args_ = args;
-  }
-  void SetEnv(const std::vector<const char*> env) {
-    env_ = env;
-  }
-
-  void Run(const std::function<void()>& child_fn, int expected_exit_status,
-           const char* expected_output) {
-    int fds[2];
-    ASSERT_NE(pipe2(fds, 0), -1);
-
-    pid_t pid = fork();
-    ASSERT_NE(pid, -1);
-
-    if (pid == 0) {
-      // Child.
-      close(fds[0]);
-      dup2(fds[1], STDOUT_FILENO);
-      dup2(fds[1], STDERR_FILENO);
-      if (fds[1] != STDOUT_FILENO && fds[1] != STDERR_FILENO) close(fds[1]);
-      child_fn();
-      FAIL();
-    }
-
-    // Parent.
-    close(fds[1]);
-    std::string output;
-    char buf[BUFSIZ];
-    ssize_t bytes_read;
-    while ((bytes_read = TEMP_FAILURE_RETRY(read(fds[0], buf, sizeof(buf)))) > 0) {
-      output.append(buf, bytes_read);
-    }
-    close(fds[0]);
-
-    AssertChildExited(pid, expected_exit_status);
-    if (expected_output != nullptr) {
-      ASSERT_EQ(expected_output, output);
-    }
-  }
-
- private:
-  std::vector<const char*> args_;
-  std::vector<const char*> env_;
-};
-
 #endif