cxgb4: Remove unused t4_free_ofld_rxqs

t4_free_ofld_rxqs() has been unused since
commit 0fbc81b3 ("chcr/cxgb4i/cxgbit/RDMA/cxgb4: Allocate resources
dynamically for all cxgb4 ULD's")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20241013203831.88051-7-linux@treblig.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>