cc: Remove TileManager.ExceededMemoryBudget histogram.

This histogram is no longer being monitored, so we are removing it.

R=pdr@chromium.org

Fixed: 1249127
Change-Id: Id45f4d53d8718188e2bd768f9f37be896077e07c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3161558
Auto-Submit: vmpstr <vmpstr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/main@{#921737}
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index 6f227fe..c7764f8 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -896,8 +896,6 @@
     }
   }
 
-  UMA_HISTOGRAM_BOOLEAN("TileManager.ExceededMemoryBudget",
-                        !had_enough_memory_to_schedule_tiles_needed_now);
   did_oom_on_last_assign_ = !had_enough_memory_to_schedule_tiles_needed_now;
 
   memory_stats_from_last_assign_.total_budget_in_bytes =
diff --git a/tools/metrics/histograms/metadata/others/histograms.xml b/tools/metrics/histograms/metadata/others/histograms.xml
index 6c7b754a..e0c5b57e 100644
--- a/tools/metrics/histograms/metadata/others/histograms.xml
+++ b/tools/metrics/histograms/metadata/others/histograms.xml
@@ -17635,6 +17635,9 @@
 
 <histogram name="TileManager.ExceededMemoryBudget" enum="TileMemoryBudget"
     expires_after="2021-10-25">
+  <obsolete>
+    Removed Sept 2021 due to lack of use.
+  </obsolete>
   <owner>pdr@chromium.org</owner>
   <owner>vmpstr@chromium.org</owner>
   <summary>