runtime: Remove more fallback :CompilerSet definitions from compiler plugins (#14413)

Continue with #14399

Signed-off-by: jiangyinzuo <jiangyinzuo@foxmail.com>
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/compiler/zig_test.vim b/runtime/compiler/zig_test.vim
index a82d2a6..dafeb6f 100644
--- a/runtime/compiler/zig_test.vim
+++ b/runtime/compiler/zig_test.vim
@@ -1,6 +1,7 @@
 " Vim compiler file
 " Compiler: Zig Compiler (zig test)
 " Upstream: https://github.com/ziglang/zig.vim
+" Last Change: 2024 Apr 05 by The Vim Project (removed :CompilerSet definition)
 
 if exists('current_compiler')
   finish
@@ -11,11 +12,6 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-
-if exists(':CompilerSet') != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 if has('patch-7.4.191')
   CompilerSet makeprg=zig\ test\ \%:S\ \$* 
 else