v3dv: drop incorrect assertion

This was intended to check that we only got
VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT
on secondary command buffers, but the spec states that this flag
should be ignored for primary command buffers.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
1 file changed