generate.bat: Fix comment bug by removing old comments

Remove NOTES section, it's no longer needed since we aren't setting the
errorlevel and more importantly the recently updated URL in the comments
is causing some unusual behavior that breaks the script.

Closes https://github.com/curl/curl/issues/649

projects/generate.bat

@@ -21,13 +21,6 @@ rem * KIND, either express or implied.
 rem *
 rem ***************************************************************************
 
-rem NOTES
-rem
-rem Do not set %ERRORLEVEL% to anything. %ERRORLEVEL% is a special variable
-rem that only contains errorlevel when %ERRORLEVEL% is not set. Same for %CD%.
-rem https://blogs.msdn.microsoft.com/oldnewthing/20080926-00/?p=20743/
-rem If you need to set the errorlevel do this instead: CALL :seterr [#]
-
 :begin
   rem Check we are running on a Windows NT derived OS
   if not "%OS%" == "Windows_NT" goto nodos