cleanup: remove unused CMake modules

[ranisalt]

Description

These modules are not used by the project, i.e. there is no find_package(<package name>) for these files.

Type of change

None of the options, dead code cleanup.

How Has This Been Tested

Building the project yields the same result, the binary is compiled and runs.

Test Configuration:

• Server Version: n/a
• Client: master
• Operating System: Arch Linux

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I checked the PR checks reports
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works