Backed out changeset 279285e42cea (bug 1547286) for causing a spike in mochitest windows webgl failures.

--HG--
extra : rebase_source : fa429aebd1f9a8e0c774607e2de7e6e644b805ba

modules/libpref/init/StaticPrefList.yaml

@@ -3481,7 +3481,7 @@
 
 - name: gfx.canvas.remote
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: false
   mirror: always
 
 - name: gfx.color_management.enablev4