NFC: Remove unnecessary 'llvm::' prefix from uses of llvm symbols declared in `mlir` namespace.

Aside from being cleaner, this also makes the codebase more consistent.

PiperOrigin-RevId: 286206974

1 files changed, 2 insertions, 2 deletions

diff --git a/mlir/lib/IR/Region.cpp b/mlir/lib/IR/Region.cpp
index c588e567bc3..6cec021b6a1 100644
--- a/mlir/lib/IR/Region.cpp
+++ b/mlir/lib/IR/Region.cpp
@@ -129,7 +129,7 @@ void Region::dropAllReferences() {
 /// is used to point to the operation containing the region, the actual error is
 /// reported at the operation with an offending use.
 static bool isIsolatedAbove(Region &region, Region &limit,
-                            llvm::Optional<Location> noteLoc) {
+                            Optional<Location> noteLoc) {
   assert(limit.isAncestor(&region) &&
          "expected isolation limit to be an ancestor of the given region");
 
@@ -174,7 +174,7 @@ static bool isIsolatedAbove(Region &region, Region &limit,
   return true;
 }
 
-bool Region::isIsolatedFromAbove(llvm::Optional<Location> noteLoc) {
+bool Region::isIsolatedFromAbove(Optional<Location> noteLoc) {
   return isIsolatedAbove(*this, *this, noteLoc);
 }