vc: remove explicit MSVC6 IDE project file and documentation

VC6 is _very_ old and we provide working makefiles even for that
compiler. Users who build with the IDE never use that method and project
file anyway and it was just lingering in the root dir.

Makefile.am

@@ -35,8 +35,8 @@ WINBUILD_DIST = winbuild/BUILD.WINDOWS.txt winbuild/gen_resp_file.bat	\
  winbuild/Makefile.msvc.names
 
 EXTRA_DIST = CHANGES COPYING maketgz Makefile.dist curl-config.in	\
- RELEASE-NOTES buildconf libcurl.pc.in vc6curl.dsw MacOSX-Framework	\
- $(CMAKE_DIST) $(WINBUILD_DIST) lib/libcurl.vers.in
+ RELEASE-NOTES buildconf libcurl.pc.in MacOSX-Framework $(CMAKE_DIST)	\
+ $(WINBUILD_DIST) lib/libcurl.vers.in
 
 bin_SCRIPTS = curl-config
 

docs/INSTALL

@@ -352,37 +352,6 @@ Win32
    at runtime.
    Run 'nmake vc-ssl-zlib' to build with both ssl and zlib support.
 
-   MSVC 6 IDE
-   ----------
-
-   A minimal VC++ 6.0 reference workspace (vc6curl.dsw) is available with the
-   source distribution archive to allow proper building of the two included
-   projects, the libcurl library and the curl tool.
-
-   1) Open the vc6curl.dsw workspace with MSVC6's IDE.
-   2) Select 'Build' from top menu.
-   3) Select 'Batch Build' from dropdown menu.
-   4) Make sure that the eight project configurations are 'checked'.
-   5) Click on the 'Build' button.
-   6) Once the eight project configurations are built you are done.
-
-   Dynamic and static libcurl libraries are built in debug and release flavours,
-   and can be located each one in its own subdirectory, DLL-Debug, DLL-Release,
-   LIB-Debug and LIB-Release, all of them below the 'lib' subdirectory.
-
-   In the same way four curl executables are created, each using its respective
-   library. The resulting curl executables are located in its own subdirectory,
-   DLL-Debug, DLL-Release, LIB-Debug and LIB-Release, below the 'src' subdir.
-
-   These reference VC++ 6.0 configurations are generated using the dynamic CRT.
-
-   Intentionally, these reference VC++ 6.0 projects and configurations don't use
-   third party libraries, such as OpenSSL or Zlib, to allow proper compilation
-   and configuration for all new users without further requirements.
-
-   If you need something more 'involved' you might adjust them for your own use,
-   or explore the world of makefiles described above 'MSVC from command line'.
-
    Borland C++ compiler
    ---------------------
 

vc6curl.dsw

-Microsoft Developer Studio Workspace File, Format Version 6.00
-# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
-
-###############################################################################
-
-Project: "libcurl"=".\lib\vc6libcurl.dsp" - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-}}}
-
-###############################################################################
-
-Project: "curlsrc"=".\src\vc6curlsrc.dsp" - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-    Begin Project Dependency
-    Project_Dep_Name libcurl
-    End Project Dependency
-}}}
-
-###############################################################################
-
-Global:
-
-Package=<5>
-{{{
-}}}
-
-Package=<3>
-{{{
-}}}
-
-###############################################################################
-