runtime(doc): update and remove  some invalid links

closes: #14748

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/if_cscop.txt b/runtime/doc/if_cscop.txt
index 3fa8f81..bb4c6a1 100644
--- a/runtime/doc/if_cscop.txt
+++ b/runtime/doc/if_cscop.txt
@@ -1,4 +1,4 @@
-*if_cscop.txt*  For Vim version 9.1.  Last change: 2022 Jan 08
+*if_cscop.txt*  For Vim version 9.1.  Last change: 2024 May 11
 
 
 		  VIM REFERENCE MANUAL    by Andy Kahn
@@ -358,7 +358,7 @@
 limited to Unix systems.
 
 Additionally Cscope support works for Win32.  For more information and a
-cscope version for Win32 see:
+cscope version for Win32 see (link seems dead):
 
 	http://iamphet.nm.ru/cscope/index.html