Remove unmapped histogram GPU.BlockStatusForClient3DAPIs

content/browser/gpu/gpu_data_manager_impl_private.cc

Index: content/browser/gpu/gpu_data_manager_impl_private.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.cc b/content/browser/gpu/gpu_data_manager_impl_private.cc
index 5999312c4117ea8ae514f1507b1c7a1071b26764..9c402fbab7b72d4a1c2c9f46a9abe8c75cacaa9e 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -1238,11 +1238,6 @@ GpuDataManagerImplPrivate::Are3DAPIsBlockedAtTime(
     // Err on the side of caution, and assume that if a particular
     // domain shows up in the block map, it's there for a good
     // reason and don't let its presence there automatically expire.
-
-    UMA_HISTOGRAM_ENUMERATION("GPU.BlockStatusForClient3DAPIs",
-                              BLOCK_STATUS_SPECIFIC_DOMAIN_BLOCKED,
-                              BLOCK_STATUS_MAX);
-
     return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_BLOCKED;
   }