Fix content_diff when a rule is removed

[Mab879]

Description:

Fix content_diff when a rule is removed the code doesn't crash.
This only happened for DISA content.

Rationale:

So the script runs when a rule is removed.

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

Fedora Environment

Oracle Linux 8 Environment

[github-actions]

🤖 A k8s content image for this PR is available at:
ghcr.io/complianceascode/k8scontent:11855
This image was built from commit: 41bc802

Click here to see how to deploy it

If you alread have Compliance Operator deployed:
utils/build_ds_container.py -i ghcr.io/complianceascode/k8scontent:11855

Otherwise deploy the content and operator together by checking out ComplianceAsCode/compliance-operator and:
CONTENT_IMAGE=ghcr.io/complianceascode/k8scontent:11855 make deploy-local

[ggbecker]

Apparently when the function was split in this pull request: https://github.com/ComplianceAsCode/content/pull/9634/files

The missing_rules declaration was left out.

But checking more thoroughly, this variable (missing_rules) doesn't seem to be used anywhere in this file, look for other occurrences in different functions.

I believe we can remove from everywhere in this file.

[jan-cerny]

@Mab879 it would be better to add into description that it affects the DISA content comparison only

[Mab879]

@Mab879 it would be better to add into description that it affects the DISA content comparison only

I can add something to the description about that.

[codeclimate]

Code Climate has analyzed commit 41bc802 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 59.2% (0.0% change).

View more on Code Climate.

[Mab879]

/packit build