[MLIR][Bufferizer][NFC] Simplify some codes. (#77254)

NFC. clean up.

Author: javedabsar1

mlir/lib/Dialect/Bufferization/Transforms/BufferViewFlowAnalysis.cpp

@@ -49,7 +49,7 @@ void BufferViewFlowAnalysis::rename(Value from, Value to) {
   dependencies[to] = dependencies[from];
   dependencies.erase(from);
 
-  for (auto &[key, value] : dependencies) {
+  for (auto &[_, value] : dependencies) {
     if (value.contains(from)) {
       value.insert(to);
       value.erase(from);

mlir/lib/Dialect/Bufferization/Transforms/EmptyTensorElimination.cpp

@@ -53,10 +53,9 @@ neededValuesDominateInsertionPoint(const DominanceInfo &domInfo,
 static bool insertionPointDominatesUses(const DominanceInfo &domInfo,
                                         Operation *insertionPoint,
                                         Operation *emptyTensorOp) {
-  for (Operation *user : emptyTensorOp->getUsers())
-    if (!domInfo.dominates(insertionPoint, user))
-      return false;
-  return true;
+  return llvm::all_of(emptyTensorOp->getUsers(), [&](Operation *user) {
+    return domInfo.dominates(insertionPoint, user);
+  });
 }
 
 /// Find a valid insertion point for a replacement of `emptyTensorOp`, assuming