Remove obsolete using declaration that was just kept around to help with API adoption.

Differential Revision: https://reviews.llvm.org/D101269

mlir/include/mlir/IR/PatternMatch.h

@@ -993,10 +993,6 @@ private:
   PDLPatternModule pdlPatterns;
 };
 
-// TODO: OwningRewritePatternList is soft-deprecated and will be removed in the
-// future.
-using OwningRewritePatternList = RewritePatternSet;
-
 } // end namespace mlir
 
 #endif // MLIR_PATTERN_MATCH_H

mlir/include/mlir/Rewrite/FrozenRewritePatternSet.h

@@ -84,10 +84,6 @@ private:
   std::shared_ptr<Impl> impl;
 };
 
-// TODO: FrozenRewritePatternList is soft-deprecated and will be removed in the
-// future.
-using FrozenRewritePatternList = FrozenRewritePatternSet;
-
 } // end namespace mlir
 
 #endif // MLIR_REWRITE_FROZENREWRITEPATTERNSET_H