docs: update docs on imagick extentsion

Author: kenjis

system/Images/Handlers/ImageMagickHandler.php

@@ -19,12 +19,6 @@
 /**
  * Class ImageMagickHandler
  *
- * To make this library as compatible as possible with the broadest
- * number of installations, we do not use the Imagick extension,
- * but simply use the command line version.
- *
- * hmm - the width & height accessors at the end use the imagick extension.
- *
  * FIXME - This needs conversion & unit testing, to use the imagick extension
  */
 class ImageMagickHandler extends BaseHandler

user_guide_src/source/libraries/images.rst

@@ -39,9 +39,7 @@ The available Handlers are as follows:
 If using the ImageMagick library, you must set the path to the library on your
 server in **app/Config/Images.php**.
 
-.. note:: The ImageMagick handler does NOT require the imagick extension to be
-        loaded on the server. As long as your script can access the library
-        and can run ``exec()`` on the server, it should work.
+.. note:: The ImageMagick handler requires the imagick extension.
 
 *******************
 Processing an Image