Revert "mlir/Presburger/MPInt: move into llvm/ADT (llvm#94953)"

This reverts commit 76030dc.

Author: makslevental

llvm/include/llvm/ADT/DynamicAPInt.h

@@ -170,7 +170,6 @@ add_llvm_component_library(LLVMSupport
   DivisionByConstantInfo.cpp
   DAGDeltaAlgorithm.cpp
   DJB.cpp
-  DynamicAPInt.cpp
   ELFAttributeParser.cpp
   ELFAttributes.cpp
   Error.cpp
@@ -224,7 +223,6 @@ add_llvm_component_library(LLVMSupport
   SHA1.cpp
   SHA256.cpp
   Signposts.cpp
-  SlowDynamicAPInt.cpp
   SmallPtrSet.cpp
   SmallVector.cpp
   SourceMgr.cpp