remove unused methods

devops-service/db/mongo/models/image.rb

@@ -73,10 +73,6 @@ module Devops
         }
       end
 
-      def self.create_from_json! json
-        Image.new( JSON.parse(json) )
-      end
-
     end
   end
 end

devops-service/db/mongo/models/key.rb

@@ -30,10 +30,6 @@ module Devops
         key
       end
 
-      def self.create_from_json json
-        Key.new( JSON.parse(json) )
-      end
-
       def filename
         File.basename(self.path)
       end

devops-service/db/mongo/models/user.rb

@@ -75,17 +75,12 @@ module Devops
         user
       end
 
-      def self.create_from_json json
-        User.new( JSON.parse(json) )
-      end
-
       def to_hash_without_id
-        o = {
+        {
           "email" => self.email,
           "password" => self.password,
           "privileges" => self.privileges
         }
-        o
       end
 
       def check_privileges cmd, required_privelege