kbuild: remove 'Building modules, stage 2.' log

This log is displayed every time modules are built, but it is not
so important.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/Makefile.modpost

@@ -90,7 +90,6 @@ quiet_cmd_modpost = MODPOST $(words $(modules)) modules
       cmd_modpost = sed 's/ko$$/o/' $(MODORDER) | $(MODPOST)
 
 __modpost:
-	@$(kecho) '  Building modules, stage 2.'
 	$(call cmd,modpost)
 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal