[NFC] Finish clean-up of #5834

That partial revert left a couple auxiliary functions that are not
currently needed.

lib/Dialect/TritonGPU/Transforms/AccelerateMatmul.cpp

@@ -225,28 +225,6 @@ static bool bwdFilter(Operation *op) {
               mlir::TypeID::get<arith::ArithDialect>());
 }
 
-static SmallVector<int, 2> getTransposeOrder(int rank) {
-  assert(rank >= 2);
-  auto transOrder = llvm::to_vector<2>(llvm::seq<int>(rank - 2));
-  transOrder.push_back(rank - 1);
-  transOrder.push_back(rank - 2);
-  return transOrder;
-}
-
-static DotOp transposeDotOp(PatternRewriter &rewriter, DotOp dotOp) {
-  auto rank = dotOp.getResult().getType().getRank();
-  Value a = dotOp.getA();
-  Value b = dotOp.getB();
-  Value c = dotOp.getC();
-  auto transOrder = getTransposeOrder(rank);
-  a = rewriter.create<TransOp>(a.getLoc(), a, transOrder);
-  b = rewriter.create<TransOp>(b.getLoc(), b, transOrder);
-  c = rewriter.create<TransOp>(c.getLoc(), c, transOrder);
-  return rewriter.create<DotOp>(dotOp.getLoc(), c.getType(), b, a, c,
-                                dotOp.getInputPrecision(),
-                                dotOp.getMaxNumImpreciseAcc());
-}
-
 // Finds the first different bitwidth in the chain of shape-preserving
 // unary ops that x depends on.
 // There are two primary scenarios:
@@ -336,7 +314,6 @@ class BlockedToMMA : public mlir::OpRewritePattern<DotOp> {
 
     bool aFromLoad = comesFromLoadOrBlockArg(dotOp.getA());
     bool bFromLoad = comesFromLoadOrBlockArg(dotOp.getB());
-    bool transpose = false;
     auto origDotOp = dotOp;
 
     Value a = dotOp.getA();
@@ -402,12 +379,6 @@ class BlockedToMMA : public mlir::OpRewritePattern<DotOp> {
                                       dotOp.getInputPrecision(),
                                       dotOp.getMaxNumImpreciseAcc());
     }
-    if (transpose) {
-      auto rank = dotOp.getResult().getType().getRank();
-      auto transOrder = getTransposeOrder(rank);
-      newDot = rewriter.create<TransOp>(newDot->getLoc(), newDot->getResult(0),
-                                        transOrder);
-    }
     // convert dot instruction
     rewriter.replaceOpWithNewOp<ConvertLayoutOp>(origDotOp, origDotOp.getType(),
                                                  newDot->getResult(0));