[MLIR][Affine] NFC. Fix outdated comment in affine analysis utils (#128406)

Author: bondhugula

mlir/lib/Dialect/Affine/Analysis/Utils.cpp

@@ -282,9 +282,8 @@ bool MemRefDependenceGraph::init() {
       // Create graph node for top-level op unless it is known to be
       // memory-effect free. This covers all unknown/unregistered ops,
       // non-affine ops with memory effects, and region-holding ops with a
-      // well-defined control flow. During the fusion validity checks, we look
-      // for non-affine ops on the path from source to destination, at which
-      // point we check which memrefs if any are used in the region.
+      // well-defined control flow. During the fusion validity checks, edges
+      // to/from these ops get looked at.
       Node *node = addNodeToMDG(&op, *this, memrefAccesses);
       if (!node)
         return false;