Remove tags file warning

This was the last thing triggering the autoload file before using an
actual Fugitive feature.

autoload/fugitive.vim

@@ -6303,16 +6303,7 @@ endfunction
 " Section: Initialization
 
 function! fugitive#Init() abort
-  let dir = s:Dir()
-  if &tags !~# '\.git' && @% !~# '\.git' && !exists('s:tags_warning')
-    let actualdir = fugitive#Find('.git/', dir)
-    if filereadable(actualdir . 'tags')
-      let s:tags_warning = 1
-      echohl WarningMsg
-      echo "Fugitive .git/tags support removed in favor of `:set tags^=./.git/tags;`"
-      echohl NONE
-    endif
-  endif
+  throw 'Third party code is using fugitive#Init() which has been removed. Contact the author if you have a reason to still use it'
 endfunction
 
 function! fugitive#is_git_dir(path) abort

plugin/fugitive.vim

@@ -279,9 +279,6 @@ function! FugitiveDetect(path) abort
       let b:git_dir = dir
     endif
   endif
-  if exists('b:git_dir')
-    return fugitive#Init()
-  endif
 endfunction
 
 function! FugitiveVimPath(path) abort