distro: Remove the 'gplv3' DISTRO_FEATURE, this in now handled by an override

Also remove commented old exceptions from the license rules.

conf/distro/seconorth-wayland-no-gplv3.conf

@@ -6,8 +6,7 @@
 require conf/distro/seconorth-wayland.conf
 
 DISTROOVERRIDES:append = ":nogplv3"
-# Remove support for GPLv3
-DISTRO_FEATURES:remove = "gplv3 acl seccomp ptest package-management"
+DISTRO_FEATURES:remove = "acl seccomp ptest package-management"
 IMAGE_FEATURES:remove = "package-management tools-debug"
 
 # Remove all GPLv3 related licenses
@@ -39,21 +38,3 @@ PACKAGE_EXCLUDE += " \
     bash \
     m4 \
     "
-
-# Adapt for Kirkstone to INCOMPATIBLE_LICENSE_EXCEPTIONS ?
-# WHITELIST_LGPL-3.0 = " \
-#     gdb \
-# "
-# 
-# WHITELIST_GPL-3.0 = " \
-#     readline \
-#     binutils \
-#     gdb \
-#     qmlbench \
-# "
-# 
-# PACKAGE_EXCLUDE = " \
-#     ${WHITELIST_LGPL-3.0} \
-#     ${WHITELIST_GPL-3.0} \
-# "
-#