overlay profiles: Drop accept keywords for dev-libs/jsoncpp

Author: krnowak

sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.accept_keywords

@@ -75,9 +75,6 @@
 # The only available ebuild (from GURU) has ~amd64 and no keyword for arm64 yet.
 =dev-libs/jose-12 **
 
-# Keep versions on both arches in sync.
-=dev-libs/jsoncpp-1.9.6-r2 ~arm64
-
 # The only available ebuild (from GURU) has ~amd64 and no keyword for arm64 yet.
 =dev-libs/luksmeta-9-r1 **