refactor: remove unneeded logic

It seems out of dated logic.

Author: kenjis

system/CLI/CommandRunner.php

@@ -48,11 +48,6 @@ public function __construct()
      */
     public function _remap($method, $params)
     {
-        // The first param is usually empty, so scrap it.
-        if (empty($params[0])) {
-            array_shift($params);
-        }
-
         return $this->index($params);
     }
 

tests/system/CLI/CommandRunnerTest.php

@@ -117,16 +117,4 @@ public function testBadCommand()
         // make sure the result looks like a command list
         $this->assertStringContainsString('Command "bogus" not found', CITestStreamFilter::$buffer);
     }
-
-    /**
-     * @TODO When the first param is empty? Use case?
-     */
-    public function testRemapEmptyFirstParams()
-    {
-        self::$runner->_remap('anyvalue', [null, 'list']);
-        $result = CITestStreamFilter::$buffer;
-
-        // make sure the result looks like a command list
-        $this->assertStringContainsString('Lists the available commands.', $result);
-    }
 }