deps: remove OpenSSL git and travis configuration
OpenSSL is packaging its git and travis configuration files. Remove them, Node.js has its own.
This will remove .gitmodules, .gitattributes, .travis.yml, .travis-create-release.sh, .travis-apt-pin.preference from being present in https://github.com/nodejs/node/tree/master/deps/openssl/openssl
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines