deps: remove OpenSSL git and travis configuration

OpenSSL is packaging its git and travis configuration files. Remove
them, Node.js has its own.

PR-URL: https://github.com/nodejs/node/pull/25689


Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>