Backed out changeset 684b6b32fab2 (bug 1375743) for driver issues on Intel HD Graphics.

modules/libpref/init/all.js

@@ -5741,13 +5741,9 @@ pref("fuzzing.enabled", false);
 #endif
 
 #if defined(XP_WIN)
-#if defined(NIGHTLY_BUILD)
-pref("layers.mlgpu.dev-enabled", true);
-#else
 pref("layers.mlgpu.dev-enabled", false);
-#endif
 
-// Both this and the master "enabled" pref must be on to use Advanced Layers
+// Both this and the master "enabled" pref must be on to use Advanced LAyers
 // on Windows 7.
 pref("layers.mlgpu.enable-on-windows7", false);
 #endif