removed no longer existent files from Manifest.txt

Manifest.txt

-FXRuby-ruby1.8.6-i386-msvcrt.iss
 History.txt
 Manifest.txt
 README
 README.txt
-README.win32.txt
 Rakefile
 TODO
 doap.rdf
@@ -376,9 +374,7 @@ ext/fox16/text_wrap.cpp
 ext/fox16/treelist_wrap.cpp
 ext/fox16/ui_wrap.cpp
 ext/fox16/unregisterOwnedObjects.cpp
-fxruby-mswin32.gemspec
 index.html
-install.rb
 lib/fox16/accel_table.rb
 lib/fox16/aliases.rb
 lib/fox16/bitmapview.rb
@@ -408,7 +404,6 @@ lib/fox16/splashscreen.rb
 lib/fox16/timeout.rb
 lib/fox16/undolist.rb
 lib/fox16/version.rb
-pre-config.rb
 rdoc-sources/FX4Splitter.rb
 rdoc-sources/FX7Segment.rb
 rdoc-sources/FXAccelTable.rb
@@ -610,10 +605,6 @@ rdoc-sources/fxdefs.rb
 scripts/build-fox.rb
 scripts/generate_kwargs_lib.rb
 scripts/iface.rb
-scripts/make-installers.rb
-scripts/make-win32-tarball.sh
-scripts/opengl-cygwin.iss
-scripts/opengl.iss
 swig-interfaces/FX4Splitter.i
 swig-interfaces/FX7Segment.i
 swig-interfaces/FXAccelTable.i
@@ -816,7 +807,6 @@ swig-interfaces/FXXBMIcon.i
 swig-interfaces/FXXBMImage.i
 swig-interfaces/FXXPMIcon.i
 swig-interfaces/FXXPMImage.i
-swig-interfaces/Makefile
 swig-interfaces/README
 swig-interfaces/common.i
 swig-interfaces/core.i
@@ -842,7 +832,6 @@ swig-interfaces/mdi.i
 swig-interfaces/menumodule.i
 swig-interfaces/ruby-typemaps.i
 swig-interfaces/scintilla.i
-swig-interfaces/swig.sed
 swig-interfaces/table-module.i
 swig-interfaces/text-module.i
 swig-interfaces/treelist-module.i