Completely ignored arguments: [--nativeLauncherVersion, 307]

i open minecraft launcher and press play
the launcher closes so it can start the game but then this is shown in the game output tapp in the launcher:

Completely ignored arguments: [--nativeLauncherVersion, 307]
[21:41:03] [Client thread/INFO]: Setting user: Creeper002
[21:41:04] [Client thread/INFO]: LWJGL Version: 2.9.4