Remove unecessary load steps in plugin

Author: Iron-E

plugin/libmodal.vim

@@ -3,9 +3,6 @@ if exists('g:loaded_libmodal')
 endif
 let g:loaded_libmodal = 1
 
-let s:save_cpo = &cpo
-set cpo&vim
-
 " ************************************************************
 " * User Configuration
 " ************************************************************
@@ -14,6 +11,3 @@ set cpo&vim
 " Change these default colors by defining or linking the corresponding highlight group.
 highlight default link LibmodalPrompt ModeMsg
 highlight default link LibmodalStar StatusLine
-
-let &cpo = s:save_cpo
-unlet s:save_cpo