runtime(sh): remove invalid commented out line in syntax script

Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: chrisbra

runtime/indent/sh.vim

@@ -307,7 +307,6 @@ function! s:end_block(line)
 endfunction
 
 function! s:start_block(line)
-#  return a:line =~ '{\s*\(#.*\)\?$'
   return a:line =~ '^[^#]*[{(]\s*\(#.*\)\?$'
 endfunction