Remove unneeded rbcrun features

- rblf_cli and rblf_env
- -c and -f

This is in preparation for making rbcrun able to function as a more
general purpose starlark interpreter.

Bug: 280685526
Test: go test, ./out/rbc ./build/make/tests/run.rbc, ./build/bazel/ci/rbc_dashboard.py --quick aosp_arm64
Change-Id: Ifff9ce7b4369422f39c5003bb85a168c78bde7cf