feat: remove custom command aliases due to conflicts with variable assignments, and there's no indication this can be used in the config file

Author: stevenxxiu

grammar.js

@@ -117,7 +117,6 @@ module.exports = grammar({
         $.unbind_key_directive,
         $.unlink_window_directive,
         $.wait_for_directive,
-        $.alias_directive,
       ),
     _command_separator: (_) => choice(";", "\\;", "';'", /\r?\n/),
 
@@ -888,15 +887,6 @@ module.exports = grammar({
         $.channel,
       ),
 
-    alias_directive: ($) =>
-      prec.left(
-        command(
-          $,
-          /[a-z-]+/,
-          repeat(choice(alias(/-\w+/, $.command_line_option), $._string)),
-        ),
-      ),
-
     option: (_) => /@?[A-Za-z-_\d]+/,
 
     hash_escape: (_) => token.immediate(prec(1, /#[#,}]/)),