QtPim: Remove qt.branch for this repository's master branch

The CI will checkout all the 'stable' branches for the dependencies.

Change-Id: I17849dc785ee28084336c7060ec5fc9e9df0f236
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Qt3D: Remove qt.branch for this repository's master branch

The CI will checkout all the 'stable' branches for the dependencies.

Change-Id: I85bf55f2e396604893b3a66a90c1d5a9bfb6cc6c
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>