No need to remove hpcac as it is no longer provided upstream.

hplip.spec

@@ -7,7 +7,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.14.10
-Release: 7%{?dist}
+Release: 8%{?dist}
 License: GPLv2+ and MIT
 
 Url: http://hplip.sourceforge.net/
@@ -364,7 +364,6 @@ rm -f %{buildroot}%{_datadir}/hplip/config_usb_printer.*
 rm -f %{buildroot}%{_datadir}/hplip/hpijs.drv.in.template
 rm -f %{buildroot}%{_datadir}/cups/mime/pstotiff.types
 rm -f %{buildroot}%{_datadir}/hplip/fax/pstotiff*
-rm -f %{buildroot}%{_cups_serverbin}/filter/hpcac
 
 # The systray applet doesn't work properly (displays icon as a
 # window), so don't ship the launcher yet.
@@ -507,6 +506,9 @@ rm -f %{buildroot}%{_sysconfdir}/xdg/autostart/hplip-systray.desktop
 %postun libs -p /sbin/ldconfig
 
 %changelog
+* Wed Jan 21 2015 Tim Waugh <twaugh@redhat.com> - 3.14.10-8
+- No need to remove hpcac as it is no longer provided upstream.
+
 * Wed Jan 21 2015 Tim Waugh <twaugh@redhat.com> - 3.14.10-7
 - Fixed uses of strncpy throughout.