[SourceKit] Delete C++ NameMatcher

The C++ `NameMatcher` has bee completely replaced by the swift-syntax `NameMatcher` now.

Author: ahoppen

include/swift/IDE/Utils.h

@@ -307,73 +307,6 @@ struct CallingParent {
   CallExpr *Call;
 };
 
-
-/// Finds the parse-only AST nodes and corresponding name and param/argument
-/// label ranges for a given list of input name start locations
-///
-/// Resolved locations also indicate the nature of the matched occurrence (e.g.
-/// whether it is within active/inactive code, or a selector or string literal).
-class NameMatcher: public ASTWalker {
-  SourceFile &SrcFile;
-  std::vector<SourceLoc> LocsToResolve;
-  std::vector<ResolvedLoc> ResolvedLocs;
-  ArrayRef<Token> TokensToCheck;
-
-  /// The \c ArgumentList of a parent \c CustomAttr (if one exists) and
-  /// the \c SourceLoc of the type name it applies to.
-  llvm::Optional<Located<ArgumentList *>> CustomAttrArgList;
-  unsigned InactiveConfigRegionNestings = 0;
-  unsigned SelectorNestings = 0;
-
-  /// The stack of parent CallExprs and the innermost expression they apply to.
-  std::vector<CallingParent> ParentCalls;
-
-  SourceManager &getSourceMgr() const;
-
-  SourceLoc nextLoc() const;
-  bool isDone() const { return LocsToResolve.empty(); };
-  bool isActive() const { return !InactiveConfigRegionNestings; };
-  bool isInSelector() const { return SelectorNestings; };
-  bool checkComments();
-  void skipLocsBefore(SourceLoc Start);
-  bool shouldSkip(Expr *E);
-  bool shouldSkip(SourceRange Range);
-  bool shouldSkip(CharSourceRange Range);
-  bool tryResolve(ASTWalker::ParentTy Node, SourceLoc NameLoc);
-  bool tryResolve(ASTWalker::ParentTy Node, DeclNameLoc NameLoc,
-                  ArgumentList *Args);
-  bool tryResolve(ASTWalker::ParentTy Node, SourceLoc NameLoc,
-                  LabelRangeType RangeType, ArrayRef<CharSourceRange> LabelLocs,
-                  llvm::Optional<unsigned> FirstTrailingLabel);
-  bool handleCustomAttrs(Decl *D);
-  ArgumentList *getApplicableArgsFor(Expr* E);
-
-  MacroWalking getMacroWalkingBehavior() const override {
-    return MacroWalking::Arguments;
-  }
-
-  PreWalkResult<Expr *> walkToExprPre(Expr *E) override;
-  PostWalkResult<Expr *> walkToExprPost(Expr *E) override;
-  PreWalkAction walkToDeclPre(Decl *D) override;
-  PreWalkResult<Stmt *> walkToStmtPre(Stmt *S) override;
-  PreWalkAction walkToTypeReprPre(TypeRepr *T) override;
-  PreWalkResult<Pattern *> walkToPatternPre(Pattern *P) override;
-  bool shouldWalkIntoGenericParams() override { return true; }
-  bool shouldWalkIntoUncheckedMacroDefinitions() override { return true; }
-
-  PreWalkResult<ArgumentList *>
-  walkToArgumentListPre(ArgumentList *ArgList) override;
-
-  // FIXME: Remove this
-  bool shouldWalkAccessorsTheOldWay() override { return true; }
-
-public:
-  explicit NameMatcher(SourceFile &SrcFile) : SrcFile(SrcFile) { }
-  std::vector<ResolvedLoc> resolve(ArrayRef<SourceLoc> Locs,
-                                   ArrayRef<Token> Tokens);
-  ResolvedLoc resolve(SourceLoc Loc);
-};
-
 enum class RangeKind : int8_t {
   Invalid = -1,
   SingleExpression,