MD Downloads: remove dangling, long gone flag

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 a5fa0356a81177921932dcf9a650fc84454cfdba..6b9c48464a6cae361e8799657bcbf0bbcff98a6a 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -72539,7 +72539,6 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-1832575380" label="show-saved-copy"/>
   <int value="-1832221649" label="disable-out-of-process-pac"/>
   <int value="-1821058653" label="enable-delay-agnostic-aec"/>
-  <int value="-1798337879" label="enable-md-downloads"/>
   <int value="-1767470652" label="out-of-process-pdf"/>
   <int value="-1751928267" label="disable-icon-ntp"/>
   <int value="-1746767834" label="ssl-interstitial-v2-gray"/>
@@ -73007,7 +73006,6 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="1777059507" label="trust-autofill-server-name-types"/>
   <int value="1783293530" label="disallow-autofill-sync-credential"/>
   <int value="1783837132" label="enable-threaded-gpu-rasterization"/>
-  <int value="1786229999" label="disable-md-downloads"/>

[Ilya Sherman, 2016/03/16 01:03:47]

No need to remove these from histograms.xml -- they ain't hurtin' anyone here :)

[Dan Beam, 2016/03/16 01:07:12]

Done.

   <int value="1791904609" label="disable-autofill-keyboard-accessory-view"/>
   <int value="1803465156" label="enable-zero-suggest-most-visited"/>
   <int value="1812368073" label="enable-new-app-list-mixer"/>