Revert "Add stub for this method."

This reverts commit 4a243d0be5dce1b051bcedd5ed49070ca4f83b1d.

Nevermind. Looks like there is logic that depends on it not being
is_callable() instead of catching an exception.

framework/Vfs/lib/Horde/Vfs/Base.php

@@ -194,20 +194,6 @@ public function read($path, $name)
         throw new Horde_Vfs_Exception('Not supported.');
     }
 
-    /**
-     * Open a read-only stream to a file in the VFS.
-     *
-     * @param string $path  The pathname to the file.
-     * @param string $name  The filename to retrieve.
-     *
-     * @return resource  The stream.
-     * @throws Horde_Vfs_Exception
-     */
-    public function readStream($path, $name)
-    {
-        throw new Horde_Vfs_Exception('Not supported.');
-    }
-
     /**
      * Retrieves a file from the VFS as an on-disk local file.
      *