Remove unused code

Author: nygrenh

app/models/user.rb

@@ -326,10 +326,6 @@ def old_encrypt(string)
       secure_hash("#{salt}--#{string}")
     end
 
-    def make_salt
-      secure_hash("#{Time.now.utc}--#{password}")
-    end
-
     def secure_hash(string)
       Digest::SHA2.hexdigest(string)
     end