Remove unused, broken rule

That rule was broken as it did not quote $@ which could be a pathname containing
"$", but it is unused anyway since 41efa153 "use
GeneratedPackage to deliver uno loader classes."

Change-Id: I4e5a15be8e4acca3d5be0c1b228f6c324d12331c

odk/CustomTarget_classes.mk

@@ -22,9 +22,6 @@ $(eval $(call gb_JavaClassSet_add_sourcefiles,loader,\
 	odk/source/com/sun/star/lib/loader/WinRegKeyException \
 ))
 
-$(call gb_CustomTarget_get_workdir,odk/classes)/%.class : $(call gb_CustomTarget_get_workdir,odk/classes)/java.done
-	touch $@
-
 $(call gb_CustomTarget_get_workdir,odk/classes)/java.done: $(call gb_JavaClassSet_get_target,loader)
 	$(call gb_Output_announce,$(subst $(WORKDIR)/,,$@),build,CPY,1)
 	cp -a $(call gb_JavaClassSet_get_classdir,loader)/com $(dir $@) && \