Revert "Update ExecUtils to support artd use cases."

This reverts commit f0061f62fbd5e4766220c154d914e7b9d07a86eb.

Reason for revert: Broke LUCI.

Change-Id: Iec793a667545a8469f2a712135353e816c623262
diff --git a/runtime/exec_utils_test.cc b/runtime/exec_utils_test.cc
index aa53739..dc789aa 100644
--- a/runtime/exec_utils_test.cc
+++ b/runtime/exec_utils_test.cc
@@ -16,34 +16,16 @@
 
 #include "exec_utils.h"
 
-#include <unistd.h>
-
 #include "android-base/stringprintf.h"
 #include "base/file_utils.h"
 #include "base/memory_tool.h"
 #include "common_runtime_test.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
 
 namespace art {
 
 std::string PrettyArguments(const char* signature);
 std::string PrettyReturnType(const char* signature);
 
-bool IsPidfdSupported() {
-#ifdef __BIONIC__
-  return true;
-#else
-  constexpr int SYS_pidfd_open = 434;
-  int pidfd = syscall(SYS_pidfd_open, getpid(), /*flags=*/0);
-  if (pidfd < 0) {
-    return false;
-  }
-  close(pidfd);
-  return true;
-#endif
-}
-
 class ExecUtilsTest : public CommonRuntimeTest {};
 
 TEST_F(ExecUtilsTest, ExecSuccess) {
@@ -62,6 +44,9 @@
 }
 
 TEST_F(ExecUtilsTest, ExecError) {
+  // This will lead to error messages in the log.
+  ScopedLogSeverity sls(LogSeverity::FATAL);
+
   std::vector<std::string> command;
   command.push_back("bogus");
   std::string error_msg;
@@ -130,10 +115,6 @@
 }
 
 TEST_F(ExecUtilsTest, ExecTimeout) {
-  if (!IsPidfdSupported()) {
-    GTEST_SKIP() << "pidfd not supported";
-  }
-
   static constexpr int kSleepSeconds = 5;
   static constexpr int kWaitSeconds = 1;
   std::vector<std::string> command = SleepCommand(kSleepSeconds);
@@ -144,10 +125,6 @@
 }
 
 TEST_F(ExecUtilsTest, ExecNoTimeout) {
-  if (!IsPidfdSupported()) {
-    GTEST_SKIP() << "pidfd not supported";
-  }
-
   static constexpr int kSleepSeconds = 1;
   static constexpr int kWaitSeconds = 5;
   std::vector<std::string> command = SleepCommand(kSleepSeconds);
@@ -157,15 +134,4 @@
   EXPECT_FALSE(timed_out);
 }
 
-TEST_F(ExecUtilsTest, ExecTimeoutNotSupported) {
-  if (IsPidfdSupported()) {
-    GTEST_SKIP() << "pidfd supported";
-  }
-
-  std::string error_msg;
-  bool timed_out;
-  ASSERT_EQ(ExecAndReturnCode({"command"}, /*timeout_sec=*/0, &timed_out, &error_msg), -1);
-  EXPECT_THAT(error_msg, testing::HasSubstr("pidfd_open failed for pid"));
-}
-
 }  // namespace art