Remove some material with questionable copyright

Change-Id: I81bc4d678f717ccc73b0199d3dd0ba0d73be716d
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>
Merge remote-tracking branch 'origin/5.3.2' into 5.3

Change-Id: Ief8c794e676fae84b5de6ad241646a43d898c023
Merge remote-tracking branch 'origin/5.3' into 5.4

Change-Id: I96f7e13e5a6f65dae1a9f7717e30021f81cf1e81
Merge remote-tracking branch 'origin/5.4' into dev

Change-Id: Ie20395da30acdbf0ac42089208046f0526fd5fb7