libpsdxx [WP]: adjust clean target in Makefile

src/libs/libpsdxx/Makefile

@@ -116,9 +116,8 @@ clean: ;
 	-find . -name \*.o | xargs --no-run-if-empty /bin/rm -v
 	-find . -name \*.d | xargs --no-run-if-empty /bin/rm -v
 	-find . -name \*.hd | xargs --no-run-if-empty /bin/rm -v
-	-/bin/rm -vf flist *.a *.so *.xxx $(TESTCBIN) $(TESTCCBIN)
-	-/bin/rm -fv $(patsubst %.txt,%.h,$(USAGEFILES))
-	-/bin/rm -fv $(patsubst %.txt,%.cc,$(USAGEFILES))
+	-/bin/rm -vf flist *.a *.so *.xxx
+	-/bin/rm -vf testpsdxx *.ps
 
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 # pattern rules