Remove workaround affecting --list-tests --gtest_filter=X.

One of the multiple workarounds added in https://crrev.com/c/3062240.

It makes `--list-tests --gtest_filter=X` behave as if it was just
`--list-tests`. Not sure why this was necessary, bots appear to work
without it?.. Could be something that changed since that CL?

Bug: angleproject:7508
Change-Id: I9988add40ddf3168e00cea2739e5a9209f633161
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3821374
Reviewed-by: Yuxin Hu <yuxinhu@google.com>

src/tests/test_utils/runner/TestSuite.cpp

@@ -1077,14 +1077,6 @@ TestSuite::TestSuite(int *argc, char **argv, std::function<void()> registerTests
 
     mTestResults.currentTestTimeout = mTestTimeout;
 
-#if defined(ANGLE_PLATFORM_ANDROID)
-    // Workaround for the Android test runner requiring a GTest test list.
-    if (mListTests && filterArgIndex.valid())
-    {
-        DeleteArg(argc, argv, filterArgIndex.value());
-    }
-#endif  // defined(ANGLE_PLATFORM_ANDROID)
-
     if (!mDisableCrashHandler)
     {
         // Note that the crash callback must be owned and not use global constructors.