Remove tools/clang/blink_gc_plugin/CMakeLists.txt from trybot_analyze_config.json

We used to have a version number for the plugin in this CMake file, so changing
it should cause things to be rebuilt, but that hasn't been the case for some
time.

As Nico figured out, this way of versioning the plugin was removed in
https://codereview.chromium.org/975503002

Bug: 416124
Change-Id: If4808ea8447e1b39435059021657536afb65db35
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1541238
Auto-Submit: Hans Wennborg <hans@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#645277}

testing/buildbot/trybot_analyze_config.json

@@ -27,7 +27,6 @@
       "testing/scripts/.*",
       "testing/test_env.py",
       "third_party/android_platform/development/scripts/.*",
-      "tools/clang/blink_gc_plugin/CMakeLists.txt",
       "tools/clang/scripts/process_crashreports.py"
     ],
     "ignores": [