Remove admin URL special case

This was cute, but not very useful, and could create confusion when used
on a repository without admin privileges.

autoload/rhubarb.vim

@@ -301,8 +301,6 @@ function! rhubarb#FugitiveUrl(...) abort
     return root . '/releases/tag/' . path[15:-1]
   elseif path =~# '^\.git/refs/remotes/[^/]\+/.'
     return root . '/commits/' . matchstr(path,'remotes/[^/]\+/\zs.*')
-  elseif path =~# '^\.git/\%(config$\|hooks\>\)'
-    return root . '/admin'
   elseif path =~# '^\.git\>'
     return root
   endif