Remove some dead code from build-svn-deps-win.pl

The zlib cmake build is dead code right now but I might want to use it later,
so I committed it initially with it and now I'm removing it.

* tools/dev/build-svn-deps-win.pl
  (build_zlib_cmake, httpd_fix_mod_deflate): Remove.
  (build_httpd): Remmove the commented out call to httpd_fix_mod_deflate().


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1467715 13f79535-47bb-0310-9956-ffa450edef68