Don't test sorting by modified time twice.

Not only is this redundant it is causing test failures on travis.

tests/TestCase/Filesystem/FolderTest.php

@@ -1371,33 +1371,6 @@ public function testSortByTime()
         $this->assertSame(['file_2.tmp', 'file_1.tmp'], $results);
     }
 
-    /**
-     * testSortByTime2 method
-     *
-     * Verify that the order using modified time is correct.
-     *
-     * @return void
-     */
-    public function testSortByTime2()
-    {
-        $Folder = new Folder(TMP . 'tests', true);
-
-        $fileA = new File($Folder->pwd() . DS . 'a.txt');
-        $fileA->create();
-
-        $fileC = new File($Folder->pwd() . DS . 'c.txt');
-        $fileC->create();
-
-        sleep(1);
-
-        $fileB = new File($Folder->pwd() . DS . 'b.txt');
-        $fileB->create();
-
-        $results = $Folder->find('.*', Folder::SORT_TIME);
-
-        $this->assertSame(['a.txt', 'c.txt', 'b.txt'], $results);
-    }
-
     /**
      * Verify that the order using name is correct.
      */