Only provide the .desktop file, do not install it by default

Makefile

@@ -1,4 +1,4 @@
-VERSION = git-20120417
+VERSION = git-20120418
 
 CC      = gcc
 CFLAGS  = -ansi -Wall -pedantic -O2
@@ -41,8 +41,6 @@ clean:
 install: all
 	@echo "installing executable file to $(DESTDIR)$(PREFIX)/bin"
 	@install -D -m 755 sxiv $(DESTDIR)$(PREFIX)/bin/sxiv
-	@echo "installing desktop file to $(DESTDIR)$(PREFIX)/share/applications"
-	@install -D -m 0644 sxiv.desktop $(DESTDIR)$(PREFIX)/share/applications/sxiv.desktop
 	@echo "installing manual page to $(DESTDIR)$(MANPREFIX)/man1"
 	@mkdir -p $(DESTDIR)$(MANPREFIX)/man1
 	@sed "s/VERSION/$(VERSION)/g" sxiv.1 > $(DESTDIR)$(MANPREFIX)/man1/sxiv.1
@@ -51,7 +49,5 @@ install: all
 uninstall:
 	@echo "removing executable file from $(DESTDIR)$(PREFIX)/bin"
 	@rm -f $(DESTDIR)$(PREFIX)/bin/sxiv
-	@echo "removing desktop file from $(DESTDIR)$(PREFIX)/share/applications"
-	@rm -f $(DESTDIR)$(PREFIX)/share/applications/sxiv.desktop
 	@echo "removing manual page from $(DESTDIR)$(MANPREFIX)/man1"
 	@rm -f $(DESTDIR)$(MANPREFIX)/man1/sxiv.1