Move pre-generated stylesheet to separate source

It is easier to keep the raw file updated without having to wrap
it in a git commit / patch.

Related: RHEL-56037

gnome-shell-extension-dash-to-dock.spec

@@ -19,6 +19,7 @@ Source0:        %{giturl}/archive/%{commit}.tar.gz
 %else
 Source0:        %{giturl}/archive/extensions.gnome.org-v%{version}.tar.gz#/%{name}-%{version}.tar.gz
 %endif
+Source1:        stylesheet.css
 
 BuildArch:      noarch
 
@@ -28,8 +29,6 @@ BuildRequires:  %{_bindir}/glib-compile-schemas
 
 %if 0%{?fedora}
 BuildRequires:  sassc
-%else
-Patch:          0001-Pre-generate-stylesheet.patch
 %endif
 
 Requires:       gnome-shell-extension-common
@@ -54,6 +53,11 @@ to leave the desktop view.
 %autosetup -n dash-to-dock-extensions.gnome.org-v%{version} -p 1
 %endif
 
+%if 0%{?rhel}
+# pre-generated stylesheet; use `make stylesheet.css` to update
+cp %{SOURCE1} .
+%endif
+
 
 %build
 %make_build