Remove unneeded checks if it runs on a Windows machine

apps/files_external/lib/AppInfo/Application.php

console.php

cron.php

lib/private/Files/Storage/Common.php

lib/private/PreviewManager.php

lib/private/Setup.php

lib/private/legacy/helper.php

lib/private/legacy/util.php

settings/admin.php

settings/templates/admin.php

tests/lib/Archive/TARTest.php

tests/lib/Archive/ZIPTest.php

tests/lib/Files/FilesystemTest.php

tests/lib/Files/Storage/LocalTest.php

tests/lib/Files/Type/DetectionTest.php

tests/lib/Files/ViewTest.php

tests/lib/ImageTest.php

tests/lib/LargeFileHelperGetFileSizeTest.php

tests/lib/TempManagerTest.php

tests/lib/UtilCheckServerTest.php