Remove unused test classes in gpu_unittests

This CL fixes the following warnings when running gpu_unittests:
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES3DecoderRGBBackbufferTest>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES2DecoderTest4>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES3DecoderTest4>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES2DecoderTestDisabledExtensions>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES2DecoderTestWithEXTMultisampleCompatibility>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES2DecoderTestWithBlendFuncExtended>
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GLES2DecoderTestWithCHROMIUMRasterTransport>

These test classes were unused so this CL removes them.

Bug: 1045846
Change-Id: I550fca53501fa94bae135ce81d87357a307a1e5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2318825
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Reviewed-by: James Darpinian <jdarpinian@chromium.org>
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#793393}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4912306e420924b20dd538e20cf745e0cd3509c9
4 files changed