adobe photoshop - Remove substracted paths from shape layers and combine into one shape layer

I'm creating a wi-fi icon in Photoshop, using three circles and subtracted paths.

Now I need to remove the subtracted area and combine the three shape layers into one shape layer without rasterizing.

This is what I want to do:

How can I do it?

Answer

Finally I managed it myself.

There is a combine Button in the toolbar you can see once clicked the path direction tool. Select the layer and click combine, That's it.