patch 9.0.0698: VisVim is outdated, does not work with current Visual Studio

Problem:    VisVim is outdated, does not work with current Visual Studio.
Solution:   Remove VisVim. (Martin Tournoij)
diff --git a/READMEdir/README_srcdos.txt b/READMEdir/README_srcdos.txt
index 2bef9de..a5fd9fe 100644
--- a/READMEdir/README_srcdos.txt
+++ b/READMEdir/README_srcdos.txt
@@ -6,7 +6,6 @@
 
 
 The DOS source archive contains the files needed to compile Vim on MS-Windows.
-It is packed for MS-Windows systems, with CR-LF.  It also includes the VisVim
-sources.
+It is packed for MS-Windows systems, with CR-LF.
 
 See "src/INSTALLpc.txt" for instructions on how to compile Vim on the PC.