Simplify zsh completion

Completion file shouldn't be sourced. It should provide only completion
code (source of _command) for command. It's task for package manager or
user to put under $fpath.

autocomplete/zsh_autocomplete

@@ -1,23 +1,16 @@
 #compdef $PROG
 
-_cli_zsh_autocomplete() {
+local -a opts
+local cur
+cur=${words[-1]}
+if [[ "$cur" == "-"* ]]; then
+  opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} ${cur} --generate-bash-completion)}")
+else
+  opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} --generate-bash-completion)}")
+fi
 
-  local -a opts
-  local cur
-  cur=${words[-1]}
-  if [[ "$cur" == "-"* ]]; then
-    opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} ${cur} --generate-bash-completion)}")
-  else
-    opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} --generate-bash-completion)}")
-  fi
-
-  if [[ "${opts[1]}" != "" ]]; then
-    _describe 'values' opts
-  else
-    _files
-  fi
-
-  return
-}
-
-compdef _cli_zsh_autocomplete $PROG
+if [[ "${opts[1]}" != "" ]]; then
+  _describe 'values' opts
+else
+  _files
+fi