Revert "jsse: Make sure we use TLSv1.2 as the default protocol."

This reverts commit c6987986c4b5f44899052ab1c93483d80997315f.
CTS includes specific test units for this, and this patch makes
us fail certification.

Fixes libcore.java.net.URLConnectionTest#testConnectViaHttps and
tests.api.javax.net.ssl.SSLSessionTest#test_getProtocol