patch 9.0.0698: VisVim is outdated, does not work with current Visual Studio

Problem:    VisVim is outdated, does not work with current Visual Studio.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/nsis/README.txt b/nsis/README.txt
index 2760609..31fa787 100644
--- a/nsis/README.txt
+++ b/nsis/README.txt
@@ -27,23 +27,20 @@
 	64-bit: src/GvimExt/gvimext64.dll
 	32-bit: src/GvimExt/gvimext.dll
 
-4.  Go to the VisVim directory and build VisVim.dll (or get it from a binary
-    archive).
-
-5.  Get a "diff.exe" program.  If you skip this the built-in diff will always
+4.  Get a "diff.exe" program.  If you skip this the built-in diff will always
     be used (which is fine for most users).  If you do have your own
     "diff.exe" put it in the "../.." directory (above the "vim82" directory,
     it's the same for all Vim versions).
     You can find one in previous Vim versions or in this archive:
 		http://www.mossbayeng.com/~ron/vim/diffutils.tar.gz
 
-6   Also put winpty32.dll and winpty-agent.exe in "../.." (above the "vim82"
+5   Also put winpty32.dll and winpty-agent.exe in "../.." (above the "vim82"
     directory).  This is required for the terminal window.
 
-7.  Do "make uganda.nsis.txt" in runtime/doc.  This requires sed, you may have
+6.  Do "make uganda.nsis.txt" in runtime/doc.  This requires sed, you may have
     to do this on Unix.  Make sure the file is in DOS file format!
 
-8.  Get gettext and iconv DLLs from the following site:
+7.  Get gettext and iconv DLLs from the following site:
 	https://github.com/mlocati/gettext-iconv-windows/releases
     Both 64- and 32-bit versions are needed.
     Download the files gettextX.X.X.X-iconvX.XX-shared-{32,64}.zip, extract