[CLEANUP beta] - Remove mapProperty

packages/ember-runtime/lib/computed/reduce_computed_macros.js

@@ -213,19 +213,6 @@ export function mapBy(dependentKey, propertyKey) {
   return map(`${dependentKey}.@each.${propertyKey}`, item => get(item, propertyKey));
 }
 
-/**
-  @method mapProperty
-  @for Ember.computed
-  @deprecated Use `Ember.computed.mapBy` instead
-  @param dependentKey
-  @param propertyKey
-  @public
-*/
-export function mapProperty() {
-  Ember.deprecate('Ember.computed.mapProperty is deprecated. Please use Ember.computed.mapBy.');
-  return mapBy.apply(this, arguments);
-}
-
 /**
   Filters the array by the callback.
 

packages/ember-runtime/lib/main.js

@@ -53,7 +53,6 @@ import {
   sort,
   setDiff,
   mapBy,
-  mapProperty,
   filter,
   filterBy,
   uniq,
@@ -115,7 +114,6 @@ EmComputed.map = map;
 EmComputed.sort = sort;
 EmComputed.setDiff = setDiff;
 EmComputed.mapBy = mapBy;
-EmComputed.mapProperty = mapProperty;
 EmComputed.filter = filter;
 EmComputed.filterBy = filterBy;
 EmComputed.uniq = uniq;

packages/ember-runtime/lib/mixins/enumerable.js

@@ -358,19 +358,6 @@ export default Mixin.create({
     });
   },
 
-  /**
-    Similar to map, this specialized function returns the value of the named
-    property on all items in the enumeration.
-
-    @method mapProperty
-    @param {String} key name of the property
-    @return {Array} The mapped array.
-    @deprecated Use `mapBy` instead
-    @private
-  */
-
-  mapProperty: aliasMethod('mapBy'),
-
   /**
     Returns an array with all of the items in the enumeration that the passed
     function returns true for. This method corresponds to `filter()` defined in

packages/ember-runtime/tests/suites/enumerable/mapBy.js

@@ -14,9 +14,4 @@ suite.test('should work also through getEach alias', function() {
   equal(obj.getEach('a').join(''), '12');
 });
 
-suite.test('should be aliased to mapProperty', function() {
-  var obj = this.newObject([]);
-  equal(obj.mapProperty, obj.mapBy);
-});
-
 export default suite;