readme: update for new behaviors

We no longer force SSL (there's a non-SSL constructor), and testing
doesn't require a gitlab host to talk to.

README.md

@@ -28,14 +28,3 @@ to the structure are easier to track.
 Sometimes, the API will return `null` for fields that have been added after the
 entry was created. In these cases, mark the field as an `Option` with a comment
 describing why it is so.
-
-# SSL
-
-This library enforces HTTPS communication because the private API token should
-not be sent over the wire in plain text.
-
-# Testing
-
-When building the tests, set the `GITLAB_TEST_HOST` environment variable. The
-tests also read the `GITLAB_TEST_TOKEN` environment during runtime so that the
-binary does not have the user token embedded in the binary.