Fix insertSubviewWithoutTouchingLayer()

[rikner]

Type of change: Bug fix

Motivation (current vs expected behavior)

Addresses a bug, where a views layer was mistakenly removed from the superlayer.

Please check if the PR fulfills these requirements

• [x] Self-review: I am confident this is the simplest and clearest way to achieve the expected behaviour
• [x] There are no dependencies on other PRs or I have linked dependencies through Zenhub
• [x] The commit messages are clean and understandable
• [ ] Tests for the changes have been added (for bug fixes / features)

[codecov[bot]]

Codecov Report

Merging #324 (e8c6d69) into master (3a88ac5) will increase coverage by 0.06%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #324      +/-   ##
==========================================
+ Coverage   51.15%   51.22%   +0.06%     
==========================================
  Files          87       87              
  Lines        2895     2899       +4     
==========================================
+ Hits         1481     1485       +4     
  Misses       1414     1414              

Impacted Files	Coverage Δ
Sources/UIView.swift	90.57% <100.00%> (+0.20%)	:arrow_up:

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