runtime(modconf): remove erroneous :endif in ftplugin

regression introduced in f86568f91848ece0c5da

closes: #15704

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/modconf.vim b/runtime/ftplugin/modconf.vim
index df1c787..68ce69a 100644
--- a/runtime/ftplugin/modconf.vim
+++ b/runtime/ftplugin/modconf.vim
@@ -1,7 +1,8 @@
 " Vim filetype plugin file
 " Language:             modules.conf(5) configuration file
+" Maintainer:           This runtime file is looking for a new maintainer.
 " Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
-" Latest Revision:      2024-09-19 (simplify keywordprg #15696)
+" Latest Revision:      2024-09-20 (remove erroneous endif)
 
 if exists("b:did_ftplugin")
   finish
@@ -23,7 +24,6 @@
   setlocal keywordprg=:ModconfKeywordPrg
   let b:undo_ftplugin .= '| setlocal keywordprg< iskeyword< | sil! delc -buffer ModconfKeywordPrg'
 endif
-endif
 
 let &cpo = s:cpo_save
 unlet s:cpo_save