makeBannerAndConfig(): disable ProveInit warning

[stefantalpalaru]

No description provided.

[tersec]

Travis failures are all unrelated to this PR:

Failed to clone 'vendor/nimbus-security-resources'. Retry scheduled
Cloning into '/home/travis/build/status-im/nim-beacon-chain/vendor/nim-metrics'...
fatal: unable to access 'https://github.com/status-im/nim-metrics.git/': transfer closed with outstanding read data remaining
fatal: clone of 'https://github.com/status-im/nim-metrics.git' into submodule path '/home/travis/build/status-im/nim-beacon-chain/vendor/nim-metrics' failed
Failed to clone 'vendor/nim-metrics' a second time, aborting
The command "eval git submodule update --init --recursive " failed 3 times.
The command "git submodule update --init --recursive" failed and exited with 1 during .
Your build has been stopped.

(x2)

and

$ scripts/setup_official_tests.sh jsonTestsCache
Downloading official test vectors
The command "scripts/setup_official_tests.sh jsonTestsCache" failed and exited with 1 during .
Your build has been stopped.

(same idea, still Travis network outage, just farther into the build)

[stefantalpalaru]

Looks like it was a GitHub problem.