Remove a binding from this KeyMap.
@param {Object} binding See {@link #addBinding for options}
function(binding){
        var me = this,
            bindings = me.bindings,
            len = bindings.length,
            i, item, keys;
            
        if (me.processing) {
            me.bindings = bindings.slice(0);
        }
        
        keys = me.processKeys(binding.key);
        for (i = 0; i < len; ++i) {
            item = bindings[i];
            if (item.fn === binding.fn && item.scope === binding.scope) {
                if (binding.alt == item.alt && binding.crtl == item.crtl && binding.shift == item.shift) {
                    if (Ext.Array.equals(item.keyCode, keys)) {
                        Ext.Array.erase(me.bindings, i, 1);
                        return;
                    }
                }
            }
        }
    }