Remove the "ancient PC" optimization #209

Gradle Tests ✅

Report	Passed	Time
build/test-results/test/TEST-listfix.config.MediaLibraryConfigurationTests.xml	1✅	549ms
build/test-results/test/TEST-listfix.io.FileUtilsTests.xml	4✅	23ms
build/test-results/test/TEST-listfix.model.playlists.LizzyPlaylistUtilTests.xml	2✅	22ms

1 tests were completed in 549ms with 1 passed, 0 failed and 0 skipped.

Test suite	Passed	Failed	Skipped	Time
listfix.config.MediaLibraryConfigurationTests	1✅			549ms

✅ normalizeFileSetToUNC()

4 tests were completed in 23ms with 4 passed, 0 failed and 0 skipped.

Test suite	Passed	Failed	Skipped	Time
listfix.io.FileUtilsTests	4✅			23ms

✅ isMediaFile()
✅ getRelativePathWithUncommonRoot()
✅ getRelativePath()
✅ getFileExtension()

2 tests were completed in 22ms with 2 passed, 0 failed and 0 skipped.

Test suite	Passed	Failed	Skipped	Time
listfix.model.playlists.LizzyPlaylistUtilTests	2✅			22ms

✅ resolvePlaylistExtension()
✅ testPlaylistType()