Drop test-phpdbg and clean-phpdbg targets

test-phpdbg doesn't work entirely, and there doesn't seem to be
any cause for having a target that cleans phpdbg in particular.

sapi/phpdbg/Makefile.frag

@@ -29,13 +29,3 @@ install-phpdbg: $(BUILD_BINARY)
 	@echo "Installing phpdbg man page:       $(INSTALL_ROOT)$(mandir)/man1/"
 	@$(mkinstalldirs) $(INSTALL_ROOT)$(mandir)/man1
 	@$(INSTALL_DATA) sapi/phpdbg/phpdbg.1 $(INSTALL_ROOT)$(mandir)/man1/$(program_prefix)phpdbg$(program_suffix).1
-
-clean-phpdbg:
-	@echo "Cleaning phpdbg object files ..."
-	find sapi/phpdbg/ -name *.lo -o -name *.o | xargs rm -f
-
-test-phpdbg:
-	@echo "Running phpdbg tests ..."
-	@$(top_builddir)/sapi/cli/php sapi/phpdbg/tests/run-tests.php --phpdbg sapi/phpdbg/phpdbg
-
-.PHONY: clean-phpdbg test-phpdbg