Remove maximization

This is low utility now that iD is full-width when
embedded, and the key combination conflicts with "Move".

Fixes #1482

js/id/id.js

@@ -24,7 +24,7 @@ window.iD = function () {
     };
 
     var history = iD.History(context),
-        dispatch = d3.dispatch('enter', 'exit', 'toggleFullscreen'),
+        dispatch = d3.dispatch('enter', 'exit'),
         mode,
         container,
         ui = iD.ui(context),
@@ -224,10 +224,6 @@ window.iD = function () {
         return assetMap[asset] || assetPath + asset;
     };
 
-    context.toggleFullscreen = function() {
-        dispatch.toggleFullscreen();
-    };
-
     return d3.rebind(context, dispatch, 'on');
 };
 

js/id/ui.js

@@ -145,8 +145,7 @@ iD.ui = function(context) {
             .on('←', pan([pa, 0]))
             .on('↑', pan([0, pa]))
             .on('→', pan([-pa, 0]))
-            .on('↓', pan([0, -pa]))
-            .on('M', function() { context.toggleFullscreen(); });
+            .on('↓', pan([0, -pa]));
 
         d3.select(document)
             .call(keybinding);