Remove flaky check in TimerQueriesTest.

We cannot guarantee that a shader with more instructions will
always take more time than a smaller shader.

Bug: angleproject:5178
Change-Id: Icf48a7b73ad482237cf3161667d75a25e36dd643
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2479682
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

src/tests/gl_tests/TimerQueriesTest.cpp

@@ -415,7 +415,9 @@ TEST_P(TimerQueriesTest, TimeElapsedMulticontextTest)
     EXPECT_LT(0ul, result2);
     EXPECT_LT(result1, 1000000000ul);
     EXPECT_LT(result2, 1000000000ul);
-    EXPECT_LT(result1, result2);
+
+    // This check can never really be non-flaky. http://anglebug.com/5178
+    // EXPECT_LT(result1, result2);
 }
 
 // Tests GPU timestamp functionality