Remove g:vimwiki_debug, which probably nobody used

plugin/vimwiki.vim

@@ -71,16 +71,10 @@ function! s:vimwiki_idx() " {{{
 endfunction " }}}
 
 function! s:setup_buffer_leave() "{{{
-  if g:vimwiki_debug == 3
-    echom "Setup_buffer_leave g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
   if &filetype ==? 'vimwiki'
     " cache global vars of current state XXX: SLOW!?
     call vimwiki#base#cache_buffer_state()
   endif
-  if g:vimwiki_debug == 3
-    echom "  Setup_buffer_leave g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
 
   let &autowriteall = s:vimwiki_autowriteall
 
@@ -91,16 +85,10 @@ function! s:setup_buffer_leave() "{{{
 endfunction "}}}
 
 function! s:setup_filetype() "{{{
-  if g:vimwiki_debug == 3
-    echom "Setup_filetype g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
   let time0 = reltime()  " start the clock  "XXX
   " Find what wiki current buffer belongs to.
   let path = expand('%:p:h')
   let idx = vimwiki#base#find_wiki(path)
-  if g:vimwiki_debug == 3
-    echom "  Setup_filetype g:curr_idx=".g:vimwiki_current_idx." find_idx=".idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
 
   if idx == -1 && g:vimwiki_global_ext == 0
     return
@@ -124,23 +112,14 @@ function! s:setup_filetype() "{{{
   endif
   " initialize and cache global vars of current state
   call vimwiki#base#setup_buffer_state(idx)
-  if g:vimwiki_debug ==3
-    echom "  Setup_filetype g:curr_idx=".g:vimwiki_current_idx." (reset_wiki_state) b:curr_idx=".s:vimwiki_idx().""
-  endif
 
   unlet! b:vimwiki_fs_rescan
   set filetype=vimwiki
-  if g:vimwiki_debug ==3
-    echom "  Setup_filetype g:curr_idx=".g:vimwiki_current_idx." (set ft=vimwiki) b:curr_idx=".s:vimwiki_idx().""
-  endif
   let time1 = vimwiki#u#time(time0)  "XXX
   call VimwikiLog_extend('timing',['plugin:setup_filetype:time1',time1])
 endfunction "}}}
 
 function! s:setup_buffer_enter() "{{{
-  if g:vimwiki_debug ==3
-    echom "Setup_buffer_enter g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
   let time0 = reltime()  " start the clock  "XXX
   if !vimwiki#base#recall_buffer_state()
     " Find what wiki current buffer belongs to.
@@ -150,9 +129,6 @@ function! s:setup_buffer_enter() "{{{
     let path = expand('%:p:h')
     let idx = vimwiki#base#find_wiki(path)
 
-    if g:vimwiki_debug ==3
-      echom "  Setup_buffer_enter g:curr_idx=".g:vimwiki_current_idx." find_idx=".idx." b:curr_idx=".s:vimwiki_idx().""
-    endif
     " The buffer's file is not in the path and user *does NOT* want his wiki
     " extension to be global -- Do not add new wiki.
     if idx == -1 && g:vimwiki_global_ext == 0
@@ -176,9 +152,6 @@ function! s:setup_buffer_enter() "{{{
     endif
     " initialize and cache global vars of current state
     call vimwiki#base#setup_buffer_state(idx)
-    if g:vimwiki_debug ==3
-      echom "  Setup_buffer_enter g:curr_idx=".g:vimwiki_current_idx." (reset_wiki_state) b:curr_idx=".s:vimwiki_idx().""
-    endif
 
   endif
 
@@ -188,18 +161,12 @@ function! s:setup_buffer_enter() "{{{
   "     au GUIEnter * nested VimwikiIndex
   if &filetype == ''
     set filetype=vimwiki
-    if g:vimwiki_debug ==3
-      echom "  Setup_buffer_enter g:curr_idx=".g:vimwiki_current_idx." (set ft vimwiki) b:curr_idx=".s:vimwiki_idx().""
-    endif
   elseif &syntax ==? 'vimwiki'
     " to force a rescan of the filesystem which may have changed
     " and update VimwikiLinks syntax group that depends on it;
     " b:vimwiki_fs_rescan indicates that setup_filetype() has not been run
     if exists("b:vimwiki_fs_rescan") && VimwikiGet('maxhi')
       set syntax=vimwiki
-      if g:vimwiki_debug ==3
-        echom "  Setup_buffer_enter g:curr_idx=".g:vimwiki_current_idx." (set syntax=vimwiki) b:curr_idx=".s:vimwiki_idx().""
-      endif
     endif
     let b:vimwiki_fs_rescan = 1
   endif
@@ -238,16 +205,10 @@ function! s:setup_buffer_enter() "{{{
 endfunction "}}}
 
 function! s:setup_buffer_reenter() "{{{
-  if g:vimwiki_debug ==3
-    echom "Setup_buffer_reenter g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
   if !vimwiki#base#recall_buffer_state()
     " Do not repeat work of s:setup_buffer_enter() and s:setup_filetype()
     " Once should be enough ...
   endif
-  if g:vimwiki_debug ==3
-    echom "  Setup_buffer_reenter g:curr_idx=".g:vimwiki_current_idx." b:curr_idx=".s:vimwiki_idx().""
-  endif
   if !exists("s:vimwiki_autowriteall")
     let s:vimwiki_autowriteall = &autowriteall
   endif
@@ -444,7 +405,6 @@ call s:default('html_header_numbering', 0)
 call s:default('html_header_numbering_sym', '')
 call s:default('conceallevel', 2)
 call s:default('url_maxsave', 15)
-call s:default('debug', 0)
 
 call s:default('diary_months', 
       \ {