plugins: Drop support for old style python plugins

All the the old python plugins have already been removed. Remove a bunch of the
other related cruft since we want to port the plugin system to libpeas

Taken from 65371f53db (diff-2bbd410468516599f21e84fecb500348)

data/xed-bugreport.sh.in

@@ -1,10 +1,7 @@
 #!/bin/sh
 
-ENABLE_PYTHON=@enable_python@
-
 PKG_CONFIG_MODULES="glib-2.0 gtk+-2.0 gtksourceview-2.0 \
-		    pygobject-2.0 pygtk-2.0 \
-		    pygtksourceview-2.0 enchant iso-codes"
+		    		enchant iso-codes"
 
 echo_padded ()
 {
@@ -53,21 +50,3 @@ else
 	echo "  pkg-config unavailable"
 fi
 echo
-
-echo "Python module versions:"
-if test "$ENABLE_PYTHON" = "yes"
-then
-	echo_padded "python"
-	python -V 2>&1 | cut -c8-
-
-	echo_padded "pygtk"
-	python -c "import gtk, sys; \
-		   sys.stdout.write('%d.%d.%d ' % gtk.pygtk_version); \
-		   sys.stdout.write('(GTK+ %d.%d.%d)' % gtk.gtk_version)" \
-		   2>/dev/null
-	echo
-else
-	echo "  Python support was not enabled at compile time."
-fi
-echo
-