[clang][dataflow][NFC] Delete unused function. (#65602)

I'm not sure why we had this originally, but the function seems to have
a pretty
onerous contract anyway for a function that is externally available, so
it seems
better not to keep it around.

clang/include/clang/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.h

@@ -132,25 +132,6 @@ struct TypeErasedDataflowAnalysisState {
   }
 };
 
-/// Transfers the state of a basic block by evaluating each of its elements in
-/// the context of `Analysis` and the states of its predecessors that are
-/// available in `BlockStates`. `PostVisitCFG` (if provided) will be applied to
-/// each element in the block, after it is evaluated.
-///
-/// Requirements:
-///
-///   All predecessors of `Block` except those with loop back edges must have
-///   already been transferred. States in `BlockStates` that are set to
-///   `std::nullopt` represent basic blocks that are not evaluated yet.
-TypeErasedDataflowAnalysisState transferBlock(
-    const ControlFlowContext &CFCtx,
-    llvm::ArrayRef<std::optional<TypeErasedDataflowAnalysisState>> BlockStates,
-    const CFGBlock &Block, const Environment &InitEnv,
-    TypeErasedDataflowAnalysis &Analysis,
-    std::function<void(const CFGElement &,
-                       const TypeErasedDataflowAnalysisState &)>
-        PostVisitCFG = nullptr);
-
 /// Performs dataflow analysis and returns a mapping from basic block IDs to
 /// dataflow analysis states that model the respective basic blocks. Indices of
 /// the returned vector correspond to basic block IDs. Returns an error if the

clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp

@@ -495,18 +495,6 @@ transferCFGBlock(const CFGBlock &Block, AnalysisContext &AC,
   return State;
 }
 
-TypeErasedDataflowAnalysisState transferBlock(
-    const ControlFlowContext &CFCtx,
-    llvm::ArrayRef<std::optional<TypeErasedDataflowAnalysisState>> BlockStates,
-    const CFGBlock &Block, const Environment &InitEnv,
-    TypeErasedDataflowAnalysis &Analysis,
-    std::function<void(const CFGElement &,
-                       const TypeErasedDataflowAnalysisState &)>
-        PostVisitCFG) {
-  AnalysisContext AC(CFCtx, Analysis, InitEnv, BlockStates);
-  return transferCFGBlock(Block, AC, PostVisitCFG);
-}
-
 llvm::Expected<std::vector<std::optional<TypeErasedDataflowAnalysisState>>>
 runTypeErasedDataflowAnalysis(
     const ControlFlowContext &CFCtx, TypeErasedDataflowAnalysis &Analysis,