[Cleanup] Remove the obsolete variations_seed pref.

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 1eadf29eda4090dd51feb77ecd0526fbba4682d0..160eca6542a763fa555a3d2cf2e1c0d881f9057f 100644
--- a/chrome/installer/util/master_preferences.h
+++ b/chrome/installer/util/master_preferences.h
@@ -161,9 +161,6 @@ class MasterPreferences {
   // Returns the compressed variations seed entry from the master prefs.
   std::string GetCompressedVariationsSeed() const;
 
-  // Returns the variations seed entry from the master prefs.
-  std::string GetVariationsSeed() const;
-
   // Returns the variations seed signature entry from the master prefs.
   std::string GetVariationsSeedSignature() const;