Delete some unused code found by -Wunused-function

chrome/browser/extensions/api/declarative/declarative_api.cc

Index: chrome/browser/extensions/api/declarative/declarative_api.cc
diff --git a/chrome/browser/extensions/api/declarative/declarative_api.cc b/chrome/browser/extensions/api/declarative/declarative_api.cc
index ce226fd6f844af5d5bb6f93f5ab77440cc1c965a..5665e8f941bf59ee5184fe1fbf5cdd8c0451a330 100644
--- a/chrome/browser/extensions/api/declarative/declarative_api.cc
+++ b/chrome/browser/extensions/api/declarative/declarative_api.cc
@@ -20,22 +20,6 @@ namespace AddRules = extensions::api::events::Event::AddRules;
 namespace GetRules = extensions::api::events::Event::GetRules;
 namespace RemoveRules = extensions::api::events::Event::RemoveRules;
 
-namespace {
-
-// Adds all entries from |list| to |out|. Assumes that all entries of |list|
-// are strings. Returns true if successful.
-bool AddAllStringValues(ListValue* list, std::vector<std::string>* out) {
-  for (ListValue::iterator i = list->begin(); i != list->end(); ++i) {
-    std::string value;
-    if (!(*i)->GetAsString(&value))
-      return false;
-    out->push_back(value);
-  }
-  return true;
-}
-
-}  // namespace
-
 namespace extensions {
 
 RulesFunction::RulesFunction() : rules_registry_(NULL) {}