no need for usage output

completions/helpers/perldoc

@@ -84,16 +84,6 @@ sub get_function_suggestions {
     return grep { /$func_rx/ } @suggestion;
 }
 
-sub usage {
-    die map "\n$_\n", (
-        "To use, issue the following command in bash:",
-        "\tcomplete -C perldoc-complete -o nospace -o default perldoc",
-        "You probably want to put that line in your ~/.bashrc file.\n",
-    );
-}
-
-usage() if not exists $ENV{'COMP_LINE'};
-
 my ( $cmd, @arg ) = get_command_line();
 my $word = pop @arg;