[Lint] Fixes some trivial SwiftLint warnings

[Jeehut]

Description

This is the first follow-up smaller PR to #104. Together with the other PRs I will be posting, all SwiftLint warnings should be fixed to allow us to enable the --strict mode of SwiftLint on the CI to prevent any new warnings getting merged in the future.

Related PRs

#518, #522, #527, #531, #534.

Note that all these PRs are completely independent and can be merged in any order.

[ChristianKienle]

Thank you very much for this PR. I will put this on hold for the next couple of days because we are in a critical phase in the project at the moment. I hope you understand. We will come back to you once this phase is over.

[Jeehut]

@ChristianKienle
I'm waiting since 11 days now (see #104) to get these SwiftLint warnings fixed and I'm not even changing any logic here. I decided to start with this part because it's a no-brainer to get them merged, but if even these PRs are being put on hold - again - then I'm really worried about the overall community aspect of this project ...

[marcussc]

@Jeehut
Sorry for the late response. We decided to close this PR due to two Reasons:

• The PR can`t be merged since there have already been changes in our SwiftLint config
• We will clean up our Project/SwitLint Rules in the next 2 Week-Sprint (starting 30th Sept.) with the Goal to have 0 Warnings coming from SwiftLint.

Sorry again for the late response and the now resulting close of this PR.