ir3/delay: Delete pre-RA repeat handling

It looks likely that any implementation of (rptN) in ir3 will have to
actually create (rptN) instructions after RA, which means that this can
be dropped.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9842>

src/freedreno/ir3/ir3_delay.c

@@ -165,28 +165,6 @@ delay_calc_srcn_prera(struct ir3_block *block,
 				continue;
 
 			d = delay_calc_srcn_prera(block, src->def->instr, consumer, srcn);
-
-			/* A (rptN) instruction executes in consecutive cycles so
-			 * it's outputs are written in successive cycles.  And
-			 * likewise for it's (r)'d (incremented) inputs, they are
-			 * read on successive cycles.
-			 *
-			 * So we need to adjust the delay for (rptN)'s assigners
-			 * and consumers accordingly.
-			 *
-			 * Note that the dst of a (rptN) instruction is implicitly
-			 * (r) (the assigner case), although that is not the case
-			 * for src registers.  There is exactly one case, bary.f,
-			 * which has a vecN (collect) src that is not (r)'d.
-			 */
-			if ((assigner->opc == OPC_META_SPLIT) && src->def->instr->repeat) {
-				/* (rptN) assigner case: */
-				d -= MIN2(d, src->def->instr->repeat - assigner->split.off);
-			} else if ((assigner->opc == OPC_META_COLLECT) && consumer->repeat &&
-					(consumer->regs[srcn]->flags & IR3_REG_R)) {
-				d -= MIN2(d, n);
-			}
-
 			delay = MAX2(delay, d);
 		}
 	} else {