remove Windows config since it is not supported anyways

Signed-off-by: Julius Härtl <jus@bitgrid.net>

config/config.sample.php

@@ -997,14 +997,6 @@ $CONFIG = [
  *  - OC\Preview\TIFF
  *  - OC\Preview\Font
  *
- * The following providers are not available in Microsoft Windows:
- *
- *  - OC\Preview\Movie
- *  - OC\Preview\MSOfficeDoc
- *  - OC\Preview\MSOffice2003
- *  - OC\Preview\MSOffice2007
- *  - OC\Preview\OpenDocument
- *  - OC\Preview\StarOffice
  *
  * Defaults to the following providers:
  *