rhc-list-ports: Delete scaled gears output code

[Miciah]

Delete the code that prints the list of scaled gears because it has been broken for a over a year and has no users.

Commit 487e6e2 broke the code in question by replacing haproxy/conf/gear-registry.db with gear-registry/gear-registry.json.

This pull request supersedes PR #5988.

[Miciah]

[test] [extended:node,rhc,gear]

[tiwillia]

[test] [extended:node,rhc,gear]

[Miciah]

[test]

[Miciah]

We're seeing the following error four times:

File "/var/lib/openshift/55bbbfa9ed80f7a5f9000bf8/app-root/data/.gear_upgrade_pre" should have been found. (MiniTest::Assertion)
./openshift-test/controller/test/cucumber/support/assertions.rb:41:in `assert_file_exist'
./openshift-test/controller/test/cucumber/step_definitions/upgrade_steps.rb:453:in `/^the invocation markers from the gear upgrade should exist$/'
openshift-test/tests/platform-upgrade.feature:17:in `And the invocation markers from the gear upgrade should exist'

Failing Scenarios:                                                          
cucumber openshift-test/tests/platform-upgrade.feature:5 # Scenario: Upgrade from compatible version

and the following error four times as well:

File "/var/lib/openshift/ci67497136/app-root/repo/cucumber_test_file" should have been found. (MiniTest::Assertion)
./openshift-test/controller/test/cucumber/support/assertions.rb:41:in `assert_file_exist'
./openshift-test/controller/test/cucumber/step_definitions/cartridge-mock_steps.rb:53:in `/^the new file will (not )?be present in the (secondary )?gear app-root repo$/'
openshift-test/tests/platform-ssh.feature:8:in `Then the new file will be present in the secondary gear app-root repo'

Failing Scenarios:                                                          
cucumber openshift-test/tests/platform-ssh.feature:3 # Scenario: Platform SSH for web proxy cartridge

neither of which looks related to the changes in this PR. [test] again.

[Miciah]

[test] again in hopes that https://www.github.com/openshift/origin-server/pull/6219 fixed the failing tests.

[Miciah]

Blocked by failures in the gear extended tests, which will be fixed by #6291.

[Miciah]

[test] again please!

[Miciah]

Maybe the test failures got fixed? [test] again please!

[openshift-bot]

Evaluated for online test up to d6bcf2d

[openshift-bot]

Online Test Results: SUCCESS (https://ci.dev.openshift.redhat.com/jenkins/job/test_pull_requests/9343/) (Extended Tests: node, rhc, gear)