Add GetAverageDifficultyForVideo query

src/operations/feed.gql

@@ -50,7 +50,6 @@ fragment VideoCardFields on VideoGQL {
     streamSegmentType
   }
   tableSize
-  pocketSize
   tags {
     tagClasses {
       name

src/operations/video.gql

@@ -211,6 +211,13 @@ query GetMedianRunForVideo($videoId: Int!) {
   }
 }
 
+query GetAverageDifficultyForVideo($videoId: Int!) {
+  getVideo(videoId: $videoId) {
+    id
+    averageDifficulty
+  }
+}
+
 fragment StreamWithEndFrames on UploadStreamGQL {
   id
   streamSegmentType

src/schema.gql

@@ -1072,10 +1072,6 @@ type Mutation {
   deleteUser: Boolean!
   createSubscription(priceId: String!): CreateSubscriptionResultGQL!
   cancelSubscription: UserSubscriptionStatusGQL!
-  submitCancellationFeedback(
-    reasons: [CancellationReasonEnum!] = null
-    feedback: String = null
-  ): Boolean!
   findPrerecordTableLayout(b64Image: String!, videoId: Int!): HomographyInfoGQL
   createUploadStream(
     videoMetadata: VideoMetadataInput!
@@ -1200,15 +1196,6 @@ type CreateSubscriptionResultGQL {
   sessionId: String!
 }
 
-enum CancellationReasonEnum {
-  DONT_PLAY_ENOUGH
-  TOO_EXPENSIVE
-  MISSING_FEATURES
-  TECHNICAL_ISSUES
-  DATA_NOT_ACCURATE
-  OTHER
-}
-
 type CreateUploadStreamReturn {
   videoId: Int!
 }