[media] drxk_hard: Remove dead code

As reported by Oliver, some old dead code were preserved there.

Thanks-to: Oliver endriss <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/drxk_hard.c

···
 				SetOperationMode(state, OM_QAM_ITU_C);
 			else
 				SetOperationMode(state, OM_QAM_ITU_A);
-				break;
-			state->m_itut_annex_c = true;
 			break;
 		case SYS_DVBT:
 			if (!state->m_hasDVBT)