Remove 2.2.0-alpha schema version pages

[michael-valdron]

What does this PR do / why we need it

Removes outdated 2.2.0-alpha schema version doc pages which should not be there since the release of 2.2.0.

Which issue(s) does this PR fix

Fixes #?

fixes devfile/api#1113

PR acceptance criteria

• Unit Tests
• E2E Tests
• Documentation
  Update the sidebar if there is a new file added or an existing filename is changed

How to test changes / Special notes to the reviewer

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit b52ee58. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

---

✅ Successfully ran 5 targets

• nx affected --target=e2e --configuration=production --parallel=1
• nx affected --target=docker-build --parallel=3
• nx affected --target=build --parallel=3
• nx affected --target=test --parallel=3 --ci --code-coverage
• nx affected --target=lint --parallel=3

---

Sent with 💌 from NxCloud.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: michael-valdron, mike-hoang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [mike-hoang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment