git-remote-mediawiki: do not remove installed files in "clean" target

Running "make clean" after a successful "make install" should not
result in a broken mediawiki remote helper.

Reported-by: Thorsten Glaser <[email protected]>
Signed-off-by: Jonathan Nieder <[email protected]>
Acked-by: Matthieu Moy <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: jrn

contrib/mw-to-git/Makefile

@@ -31,7 +31,6 @@ install: install_pm
 clean:
 	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
                 clean-perl-script
-	rm $(INSTLIBDIR)/$(GIT_MEDIAWIKI_PM)
 
 perlcritic:
 	perlcritic -2 *.perl