Remove numeric hinttext.

ui/keyboard/resources/elements/kb-keyset.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 Polymer('kb-keyset', {
   align: "center",
+  // Propagate flick gestures to keys in this keyset.
+  flick: true,
   isDefault: false,
   nextKeyset: undefined,
   // Weight offsets for positioning the keyset.
   weightBottom: 15,
   weightLeft: 10,
   weightRight: 10,
   weightTop: 6,
 
   /**
    * Weight assigned to space between keys, of the form "xPitch yPitch".
@@ skipping 76 matching lines @@
     var old = $('keyboard').querySelector('.activeKeyset');
     if (old && old != this)
       old.classList.remove('activeKeyset');
     this.classList.add('activeKeyset');
     this.fire('stateChange', {
       state: 'keysetChanged',
       value: this.id
     });
   },
 });