Remove multi-install from installer_util.

chrome/installer/util/master_preferences.h

Index: chrome/installer/util/master_preferences.h
diff --git a/chrome/installer/util/master_preferences.h b/chrome/installer/util/master_preferences.h
index 9f1a569ac571cf2ddbcfc552b83711a345bbb70b..4c5704869d04f9b7339d2a4818bfacea1cb27fea 100644
--- a/chrome/installer/util/master_preferences.h
+++ b/chrome/installer/util/master_preferences.h
@@ -170,8 +170,6 @@ class MasterPreferences {
     return preferences_read_from_file_;
   }
 
-  bool is_multi_install() const { return false; }
-
   // Returns a reference to this MasterPreferences' root dictionary of values.
   const base::DictionaryValue& master_dictionary() const {
     return *master_dictionary_.get();