Replace configurable static size for notes and post textarea with css

lang_zh_CN.php

@@ -155,10 +155,6 @@ $T=[
 	'timestamps' => 'Show Timestamps',
 	'embed' => 'Embed images',
 	'incognito' => 'Incognito mode',
-	'pbsize' => 'Post box size',
-	'nbsize' => 'Notes box size',
-	'width' => 'Width:',
-	'height' => 'Height:',
 	'changepass' => 'Change Password',
 	'oldpass' => 'Old password:',
 	'newpass' => 'New password:',