Bug 1672303 - part 2: Get rid of "dom.inputevent.data.enabled" r=smaug

Depends on D94248

Differential Revision: https://phabricator.services.mozilla.com/D94249

dom/webidl/InputEvent.webidl

@@ -16,7 +16,7 @@ interface InputEvent : UIEvent
 
   readonly attribute DOMString inputType;
 
-  [NeedsCallerType, Pref="dom.inputevent.data.enabled"]
+  [NeedsCallerType]
   readonly attribute DOMString? data;
 };
 

modules/libpref/init/StaticPrefList.yaml

@@ -2036,12 +2036,6 @@
   value: false
   mirror: always
 
-# Is support for InputEvent.data enabled?
-- name: dom.inputevent.data.enabled
-  type: bool
-  value: true
-  mirror: always
-
 # Is support for InputEvent.dataTransfer enabled?
 - name: dom.inputevent.datatransfer.enabled
   type: bool