cleanup: remove non-existing bazel.sync.collect.virtual.includes.hints key (#7190)

Cleanup for a registry key removed a while ago

Author: ujohnny

base/tests/unittests/com/google/idea/blaze/base/sync/workspace/ExecutionRootPathResolverTest.java

@@ -138,7 +138,6 @@ private static TargetMap getTargetMap() {
   @Override
   protected void initTest(Container applicationServices, Container projectServices) {
     Registry.get("bazel.sync.resolve.virtual.includes").setValue(true);
-    Registry.get("bazel.sync.collect.virtual.includes.hints").setValue(false);
 
     pathResolver =
         new ExecutionRootPathResolver(

cpp/tests/unittests/com/google/idea/blaze/cpp/BlazeCompilerSettingsTest.java

@@ -56,7 +56,6 @@ protected void initTest(Container applicationServices, Container projectServices
     applicationServices.register(ExperimentService.class, new MockExperimentService());
 
     Registry.get("bazel.sync.resolve.virtual.includes").setValue(true);
-    Registry.get("bazel.sync.collect.virtual.includes.hints").setValue(true);
 
     applicationServices.register(QuerySyncSettings.class, new QuerySyncSettings());