Remove gather_source from Bodhi's pungi configs.

Pungi's gather_source setting doesn't do anything, and using it
causes Pungi to print this to stderr:

WARNING: Config option gather_source was removed and has no effect;
remove it.

Signed-off-by: Randy Barlow <randy@electronsweatshop.com>

roles/bodhi2/backend/templates/pungi.module.conf.j2

@@ -41,7 +41,6 @@ pkgset_koji_inherit = False
 filter_system_release_packages = False
 
 # GATHER
-gather_source = 'module'
 gather_method = 'nodeps'
 gather_profiler = True
 check_deps = False

roles/bodhi2/backend/templates/pungi.rpm.conf.j2

@@ -48,7 +48,6 @@ pkgset_koji_inherit = False
 filter_system_release_packages = False
 
 # GATHER
-gather_source = 'comps'
 gather_method = 'deps'
 gather_backend = 'dnf'
 check_deps = False