[all-commits] [llvm/llvm-project] 0db88d: flang] Remove remaining uses of llvm::Optional (NFC)

[kazutakahirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0db88db5d90f8d8a76360725597e0dfb82cc9661
      https://github.com/llvm/llvm-project/commit/0db88db5d90f8d8a76360725597e0dfb82cc9661
  Author: Kazu Hirata <kazu at google.com>
  Date:   2023-01-07 (Sat, 07 Jan 2023)

  Changed paths:
    M flang/include/flang/Lower/CustomIntrinsicCall.h
    M flang/include/flang/Lower/IntrinsicCall.h
    M flang/include/flang/Lower/Runtime.h
    M flang/include/flang/Lower/SymbolMap.h
    M flang/include/flang/Optimizer/Builder/FIRBuilder.h
    M flang/lib/Lower/Mangler.cpp
    M flang/lib/Optimizer/Transforms/AffinePromotion.cpp
    M flang/lib/Optimizer/Transforms/MemRefDataFlowOpt.cpp
    M flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp

  Log Message:
  -----------
  flang] Remove remaining uses of llvm::Optional (NFC)

This patch removes the unused "using" declaration and removes #include
"llvm/ADT/Optional.h".

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716