D1: Remove qh.commit() - pipeline handles commit internally

dsv4/kernels/attention/fmha.py

@@ -221,15 +221,12 @@ class FmhaKernel:
                         # Load Q[k_sub] → sQ
                         qh = qp.acquire_and_advance()
                         cute.copy(tma_q, tAgQ[(None, Int32(k_sub))], tAsQ[(None, qh.index)], tma_bar_ptr=qh.barrier)
-                        qh.commit()
                         # Load K[k_sub] → sK
                         kvh = kvp.acquire_and_advance()
                         cute.copy(tma_k, tBgK[(None, Int32(k_sub))], tBsK[(None, kvh.index)], tma_bar_ptr=kvh.barrier)
-                        kvh.commit()
                     # Load V[kt] → sV
                     kvh = kvp.acquire_and_advance()
                     cute.copy(tma_v, tVgV[(None, Int32(kt))], tVsV[(None, kvh.index)], tma_bar_ptr=kvh.barrier)
-                    kvh.commit()
                 qp.tail()
                 kvp.tail()
             else: