Revert "[Memory-UMA] Implement basic working prototype."

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index cb5848722807701e0a84ce4977fe239aa426b28e..d1800f8261a89d2e3f42ae6331697e1debe91683 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -84299,8 +84299,6 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram_suffixes name="BrowserMemoryAllocator2" separator=".">
   <suffix name="Resident" label="Only counting resident memory."/>
-  <suffix name="PrivateMemoryFootprint"
-      label="Only counting private resident + swapped/compressed memory."/>
   <suffix name="Malloc" label="Constrained to malloc allocator."/>
   <affected-histogram name="Memory.Experimental.Browser2"/>
 </histogram_suffixes>
@@ -86290,8 +86288,6 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram_suffixes name="GpuMemoryAllocator2" separator=".">
   <suffix name="Resident" label="Only counting resident memory."/>
-  <suffix name="PrivateMemoryFootprint"
-      label="Only counting private resident + swapped/compressed memory."/>
   <suffix name="Malloc" label="Constrained to malloc allocator."/>
   <affected-histogram name="Memory.Experimental.Gpu2"/>
 </histogram_suffixes>
@@ -91077,8 +91073,6 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram_suffixes name="RendererMemoryAllocator2" separator=".">
   <suffix name="Resident" label="Only counting resident memory."/>
-  <suffix name="PrivateMemoryFootprint"
-      label="Only counting private resident + swapped/compressed memory."/>
   <suffix name="Malloc" label="Constrained to malloc allocator."/>
   <suffix name="PartitionAlloc" label="Constrained to partition allocator."/>
   <suffix name="BlinkGC" label="Constrained to blink GC allocator."/>