qca-wifi: Remove dp_rx_mon.h inclusion from dp_tx_capture.c
Remove dp_rx_mon.h inclusion from dp_tx_capture.c
In I3a31dacd7d7e817f144708f9bda5536808080864,
dp monitor inline APIs are moved to header file.
This change is needed to get dp_tx_capture.c compiled.
Change-Id: I145cac1afbc4e19a5d36a97c4a9cbe93fe67f700