build: remove empty files when building the RPM

dist/index.css.LEGAL.txt is empty, as we don't explicitely import
external CSS files. The ones from Patternfly are imported indirectly
from JS.

Makefile

@@ -101,6 +101,8 @@ rsync:
 install: $(DIST_TEST) po/LINGUAS
 	mkdir -p $(DESTDIR)/usr/share/cockpit/$(PACKAGE_NAME)
 	cp -r dist/* $(DESTDIR)/usr/share/cockpit/$(PACKAGE_NAME)
+	# CSS Licence file is empty, so don't keep it
+	rm $(DESTDIR)/usr/share/cockpit/$(PACKAGE_NAME)/index.css.LEGAL.txt
 	mkdir -p $(DESTDIR)/usr/share/anaconda
 	cp -r firefox-theme $(DESTDIR)/usr/share/anaconda/
 	mkdir -p $(DESTDIR)/usr/share/metainfo/

packaging/anaconda-webui.spec.in

@@ -43,10 +43,9 @@ appstream-util validate-relax --nonet %{buildroot}/%{_datadir}/metainfo/*
 %files
 %dir %{_datadir}/cockpit/anaconda-webui
 %doc README.rst
-%license LICENSE dist/index.js.LEGAL.txt dist/index.css.LEGAL.txt
+%license LICENSE dist/index.js.LEGAL.txt
 %{_datadir}/cockpit/anaconda-webui/logo.svg
 %{_datadir}/cockpit/anaconda-webui/index.js.LEGAL.txt
-%{_datadir}/cockpit/anaconda-webui/index.css.LEGAL.txt
 %{_datadir}/cockpit/anaconda-webui/index.html
 %{_datadir}/cockpit/anaconda-webui/index.js.gz
 %{_datadir}/cockpit/anaconda-webui/index.js.map