Fix build error on Windows.

im/installer/windows/Makefile.in

@@ -117,13 +117,3 @@ $(CONFIG_DIR)/setup.exe::
 
 include $(topsrcdir)/config/rules.mk
 include $(MOZILLA_SRCDIR)/toolkit/mozapps/installer/windows/nsis/makensis.mk
-
-export::
-ifndef MOZ_BRANDING_DIRECTORY
-	$(NSINSTALL) -D $(DIST)/branding
-	cp $(srcdir)/nsis/branding.nsi $(DIST)/branding/branding.nsi
-	cp $(srcdir)/wizHeader.bmp     $(DIST)/branding/wizHeader.bmp
-	cp $(srcdir)/wizHeaderRTL.bmp  $(DIST)/branding/wizHeaderRTL.bmp
-	cp $(srcdir)/wizWatermark.bmp  $(DIST)/branding/wizWatermark.bmp
-endif
-