Followup for issue #14321, remove references to Parser/pgen.stamp
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 9c75e3b..a77b8b4 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1351,7 +1351,7 @@
 
 clobber: clean profile-removal
 	-rm -f $(BUILDPYTHON) $(PGEN) $(LIBRARY) $(LDLIBRARY) $(DLLLIBRARY) \
-		tags TAGS Parser/pgen.stamp \
+		tags TAGS \
 		config.cache config.log pyconfig.h Modules/config.c
 	-rm -rf build platform
 	-rm -rf $(PYTHONFRAMEWORKDIR)