[mlir] Remove a redundant cast (NFC) (#168241)

llvm::all_of already returns bool.

Identified with readability-redundant-casting.

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

diff --git a/mlir/lib/Dialect/Bufferization/Transforms/OneShotAnalysis.cpp b/mlir/lib/Dialect/Bufferization/Transforms/OneShotAnalysis.cpp
index 9ccbfd3..5dfe3e6 100644
--- a/mlir/lib/Dialect/Bufferization/Transforms/OneShotAnalysis.cpp
+++ b/mlir/lib/Dialect/Bufferization/Transforms/OneShotAnalysis.cpp
@@ -497,7 +497,7 @@
   // terminates. All of them must be equivalent subsets.
   SetVector<Value> backwardSlice =
       state.findValueInReverseUseDefChain(opOperand, matchingSubset);
-  return static_cast<bool>(llvm::all_of(backwardSlice, matchingSubset));
+  return llvm::all_of(backwardSlice, matchingSubset);
 }
 
 /// Return "true" if the given "read" and potentially conflicting "write" are