remove keys no longer in image endpoint

src/data/objects/image.yaml

@@ -23,15 +23,6 @@ schema:
       A detailed description of this image.
     limit: 0-65000 characters
     editable: true
-  status:
-    type: Enum
-    subtype: Status
-    value: available
-    description: The status of the image.
-  filesystem:
-    type: String
-    value: ext4
-    description: The filesystem type of the image.
   created:
     type: String
     value: "2015-09-29T11:21:01"
@@ -50,15 +41,11 @@ schema:
     value: false
     filterable: true
     description: True if the image is public.
-  last_used:
-    type: String
-    value: "2017-10-19T11:21:01"
-    description: The last time this image was used.
-  min_deploy_size:
+  size:
     type: Integer
     value: 1000
     description: The minimum size this image needs to deploy.
-  creator:
+  created_by:
     type: String
     value: your_username
     description: The name of the user who created this image, or linode for official images.
@@ -69,10 +56,6 @@ schema:
       None for private images.
     filterable: true
 enums:
-  Status:
-    creating: creating
-    available: available
-    deleted: deleted
   Type:
-    0: Image was created manually
-    1: Image was created automatically from a deleted Linode
+    manual: Image was created manually
+    automatic: Image was created automatically from a deleted Linode