Bug 1632413 - Remove webConsoleCommands trait. r=nchevobbe

Differential Revision: https://phabricator.services.mozilla.com/D72299

devtools/client/definitions.js

@@ -418,7 +418,7 @@ Tools.dom = {
   inMenu: true,
 
   isTargetSupported: function(target) {
-    return target.getTrait("webConsoleCommands");
+    return true;
   },
 
   build: function(iframeWindow, toolbox) {

devtools/server/actors/root.js

@@ -138,9 +138,6 @@ exports.RootActor = protocol.ActorClassWithSpec(rootSpec, {
       // Whether the server can return wasm binary source
       wasmBinarySource: true,
       bulk: true,
-      // Added in Firefox 40. Indicates that the backend supports registering custom
-      // commands through the WebConsoleCommands API.
-      webConsoleCommands: true,
       // Whether root actor exposes chrome target actors and access to any window.
       // If allowChromeProcess is true, you can:
       // * get a ParentProcessTargetActor instance to debug chrome and any non-content