Bug 1717162 - Allow extra tick mode to ride the trains. r=bas

Differential Revision: https://phabricator.services.mozilla.com/D118251

modules/libpref/init/StaticPrefList.yaml

@@ -7320,11 +7320,7 @@
 # <0 to disable extra ticks entirely.
 - name: layout.extra-tick.minimum-ms
   type: int32_t
-#if defined(NIGHTLY_BUILD)
   value: 4
-#else
-  value: -1
-#endif
   mirror: always
 
 # Enable/disable interruptible reflow, which allows reflows to stop