Removing unused functions.

Author: qiongsiwu

include/swift/AST/ModuleDependencies.h

@@ -318,14 +318,6 @@ class SwiftInterfaceModuleDependenciesStorage
   void updateCommandLine(const std::vector<std::string> &newCommandLine) {
     textualModuleDetails.buildCommandLine = newCommandLine;
   }
-
-  void updateModuleOutputPath(const std::string &newPath) {
-    const_cast<std::string &>(moduleOutputPath) = newPath;
-  }
-
-  void updateContextHash(const std::string &newContextHash) {
-    const_cast<std::string &>(contextHash) = newContextHash;
-  }
 };
 
 /// Describes the dependencies of a Swift module
@@ -879,20 +871,6 @@ class ModuleDependencyInfo {
       llvm_unreachable("Unexpected type");
   }
 
-  void updateModuleOutputPath(const std::string &newPath) {
-    if (isSwiftInterfaceModule())
-      return cast<SwiftInterfaceModuleDependenciesStorage>(storage.get())
-          ->updateModuleOutputPath(newPath);
-    llvm_unreachable("Unexpected type");
-  }
-
-  void updateContextHash(const std::string &newContextHash) {
-    if (isSwiftInterfaceModule())
-      return cast<SwiftInterfaceModuleDependenciesStorage>(storage.get())
-          ->updateContextHash(newContextHash);
-    llvm_unreachable("Unexpected type");
-  }
-
   /// Whether explicit input paths of all the module dependencies
   /// have been specified on the command-line recipe for this module.
   bool isFinalized() const { return storage->finalized; }