misc: remove unused comment

src/main/scala/xiangshan/cache/ptw.scala

@@ -517,7 +517,7 @@ class PTWImp(outer: PTW) extends PtwModule(outer){
   val pteRead =  edge.Get(
     fromSource = 0.U/*id*/,
     // toAddress  = memAddr(log2Up(CacheLineSize / 2 / 8) - 1, 0),
-    toAddress  = Cat(memAddr(PAddrBits - 1, log2Up(l1BusDataWidth/8)), 0.U(log2Up(l1BusDataWidth/8).W)),  // 00000
+    toAddress  = Cat(memAddr(PAddrBits - 1, log2Up(l1BusDataWidth/8)), 0.U(log2Up(l1BusDataWidth/8).W)),
     lgSize     = log2Up(l1BusDataWidth/8).U
   )._2
   mem.a.bits  := pteRead
@@ -726,4 +726,4 @@ class PTWRepeater extends XSModule with HasXSParameter with HasXSLog with HasPtw
   XSDebug(io.tlb.req.valid || io.tlb.resp.valid, p"tlb: ${tlb}\n")
   XSDebug(io.ptw.req.valid || io.ptw.resp.valid, p"ptw: ${ptw}\n")
   assert(!RegNext(recv && io.ptw.resp.valid), "re-receive ptw.resp")
-}
\ No newline at end of file
+}