d/control: remove static libssl1.1 dependency

The dependency to libssl that is added since 1 will become a problem with future transitions. Like currently already ongoing with openssl 3 in Ubuntu it will end up with a proper dependency to libssl3 due to ${shlibs:Depends} but since it is a static entry also not let go of libssl1.1.

Since shlibs:Depends works just fine remove the static dependency which will fix this in Ubuntu once auto-synced and avoid it to become a problem in Debian later on.

Fixes: 39c91c8d Enable TLS capabilities by default