d/rules: simplify validation of *.desktop files

The tools have gotten better, we don't need this clumsy work-around
any more.

Author: SebKuzminsky

debian/rules.in

@@ -71,14 +71,7 @@ override_dh_auto_install:
 	rm -rf $(DESTDIR)
 	# executing regular installation with regular prefix but unterneath the debian folder
 	DESTDIR=$(DESTDIR) $(MAKE) -C src install
-	# Version 0.22 and newer of the desktop-file-validate program
-	# (in Jessie and newer) can deal with multiple files specified
-	# on the command line.	Version 0.20 (in Wheezy) says it can,
-	# but can't.  So feed it the files one by one.
-	for F in $(shell find debian/extras/ share/applications/ -name *.desktop); do \
-		desktop-file-validate $$F; \
-	done
-	# Adding files that are Debian-specific
+	desktop-file-validate $(shell find debian/extras/ share/applications/ -name *.desktop);
 	cd debian/extras && cp -a * $(DESTDIR)
 	DESTDIR=$(DESTDIR) $(MAKE) -C src INSTALL=install
 	py3clean .