Removed unused Date.prototype.getHourMinute().

Unused since d2180a6bf3a72bad67bf4897b0ce2d94a6214fc4.

django/contrib/admin/static/admin/js/core.js

@@ -107,10 +107,6 @@ function findPosY(obj) {
         return (this.getSeconds() < 10) ? '0' + this.getSeconds() : this.getSeconds();
     };
 
-    Date.prototype.getHourMinute = function() {
-        return this.getTwoDigitHour() + ':' + this.getTwoDigitMinute();
-    };
-
     Date.prototype.getFullMonthName = function() {
         return typeof window.CalendarNamespace === "undefined"
             ? this.getTwoDigitMonth()

js_tests/admin/core.test.js

@@ -41,11 +41,6 @@ QUnit.test('Date.getTwoDigitSecond', function(assert) {
     assert.equal(new Date(2014, 6, 1, 0, 0, 20).getTwoDigitSecond(), '20', '12:00:20 am is 20');
 });
 
-QUnit.test('Date.getHourMinute', function(assert) {
-    assert.equal(new Date(2014, 6, 1, 11, 0).getHourMinute(), '11:00', '11:00 am is 11:00');
-    assert.equal(new Date(2014, 6, 1, 13, 25).getHourMinute(), '13:25', '1:25 pm is 13:25');
-});
-
 QUnit.test('Date.strftime', function(assert) {
     var date = new Date(2014, 6, 1, 11, 0, 5);
     assert.equal(date.strftime('%Y-%m-%d %H:%M:%S'), '2014-07-01 11:00:05');