Fix some compiler warnings

Author: eeckstein

lib/AST/ASTContext.cpp

@@ -2201,13 +2201,6 @@ Identifier ASTContext::getRealModuleName(Identifier key, ModuleAliasLookupOption
   return value.first;
 }
 
-namespace {
-  static StringRef pathStringFromSearchPath(
-      const SearchPathOptions::SearchPath &next) {
-    return next.Path;
-  }
-}
-
 std::vector<std::string> ASTContext::getDarwinImplicitFrameworkSearchPaths()
 const {
   assert(LangOpts.Target.isOSDarwin());

lib/Demangling/Remangler.cpp

@@ -2781,8 +2781,8 @@ ManglingError Remangler::mangleDependentProtocolConformanceOpaque(Node *node,
                                                                   unsigned depth) {
   DEMANGLER_ASSERT(node->getKind() == Node::Kind::DependentProtocolConformanceOpaque,
                    node);
-  mangleAnyProtocolConformance(node->getChild(0), depth + 1);
-  mangleType(node->getChild(1), depth + 1);
+  RETURN_IF_ERROR(mangleAnyProtocolConformance(node->getChild(0), depth + 1));
+  RETURN_IF_ERROR(mangleType(node->getChild(1), depth + 1));
   Buffer << "HO";
   return ManglingError::Success;
 }