NFC comment-only cleanups

 - Remove leftover comment from de2568a
 - Fix a typo in a comment

Author: sanjoy

mlir/lib/Dialect/Linalg/Transforms/FusionOnTensors.cpp

@@ -26,7 +26,6 @@ using namespace mlir;
 using namespace mlir::linalg;
 
 /// Implementation of fusion of generic ops and indexed_generic ops.
-// struct FuseGenericOpsOnTensors {
 static bool areTensorOpsFusable(LinalgOp producer, LinalgOp consumer,
                                 unsigned consumerIdx) {
   // Producer and consumer must have tensor semantics.