[AST] NFC: Remove some unused declarations

Author: hamishknight

include/swift/AST/TypeCheckRequests.h

@@ -1961,12 +1961,10 @@ class InitAccessorPropertiesRequest :
 private:
   friend SimpleRequest;
 
+  // Evaluation.
   ArrayRef<VarDecl *>
   evaluate(Evaluator &evaluator, NominalTypeDecl *decl) const;
 
-  // Evaluation.
-  bool evaluate(Evaluator &evaluator, AbstractStorageDecl *decl) const;
-
 public:
   bool isCached() const { return true; }
 };
@@ -1983,12 +1981,10 @@ class MemberwiseInitPropertiesRequest :
 private:
   friend SimpleRequest;
 
+  // Evaluation.
   ArrayRef<VarDecl *>
   evaluate(Evaluator &evaluator, NominalTypeDecl *decl) const;
 
-  // Evaluation.
-  bool evaluate(Evaluator &evaluator, AbstractStorageDecl *decl) const;
-
 public:
   bool isCached() const { return true; }
 };