Bug 1486834 - Remove browserConsoleUsesHTML and browserConsoleURL from webconsole definition;r=nchevobbe

These were used when we were working on the HTML version of the frontend, but now
we don't even ship the XUL version, and these properties got missed during removal.

Differential Revision: https://phabricator.services.mozilla.com/D4463

--HG--
extra : moz-landing-system : lando

devtools/client/definitions.js

@@ -107,14 +107,6 @@ Tools.webConsole = {
   accesskey: l10n("webConsoleCmd.accesskey"),
   ordinal: 2,
   url: "chrome://devtools/content/webconsole/index.html",
-  get browserConsoleUsesHTML() {
-    return Services.prefs.getBoolPref("devtools.browserconsole.html");
-  },
-  get browserConsoleURL() {
-    return this.browserConsoleUsesHTML ?
-      "chrome://devtools/content/webconsole/index.html" :
-      "chrome://devtools/content/webconsole/browserconsole.xul";
-  },
   icon: "chrome://devtools/skin/images/tool-webconsole.svg",
   label: l10n("ToolboxTabWebconsole.label"),
   menuLabel: l10n("MenuWebconsole.label"),