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/scdoc.vim b/runtime/compiler/scdoc.vim
index c37969f..364ddc1 100644
--- a/runtime/compiler/scdoc.vim
+++ b/runtime/compiler/scdoc.vim
@@ -2,6 +2,7 @@
 " Compiler: scdoc
 " Maintainer: Gregory Anders <contact@gpanders.com>
 " Last Updated: 2019-10-24
+"               2024 Apr 05 by The Vim Project (removed :CompilerSet definition)
 " Upstream: https://github.com/gpanders/vim-scdoc
 
 if exists('current_compiler')
@@ -9,9 +10,5 @@
 endif
 let current_compiler = 'scdoc'
 
-if exists(':CompilerSet') != 2
-    command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=scdoc\ <\ %\ 2>&1
 CompilerSet errorformat=Error\ at\ %l:%c:\ %m,%-G%.%#