System.Filepath: remove mis comment

Co-authored-by: ujihisa <[email protected]>

Author: tsuyoshicho

autoload/vital/__vital__/System/Filepath.vim

@@ -15,7 +15,7 @@ let s:is_cygwin = has('win32unix')
 let s:is_mac = !s:is_windows && !s:is_cygwin
       \ && (has('mac') || has('macunix') || has('gui_macvim') ||
       \   (!isdirectory('/proc') && executable('sw_vers')))
-" windows expand follow do not need for file extension
+
 let s:is_case_tolerant = filereadable(expand('<sfile>:r') . '.VIM')
 
 if s:is_windows