Remove contract's lastUpdatedTime

common/contract.ts

@@ -20,7 +20,6 @@ export type FullContract<
   visibility: 'public' | 'unlisted'
 
   createdTime: number // Milliseconds since epoch
-  lastUpdatedTime: number // If the question or description was changed
   lastBetTime?: number
   lastCommentTime?: number
   closeTime?: number // When no more trading is allowed

common/new-contract.ts

@@ -53,7 +53,6 @@ export function getNewContract(
     visibility: 'public',
     isResolved: false,
     createdTime: Date.now(),
-    lastUpdatedTime: Date.now(),
     closeTime,
 
     volume,

web/components/feed/find-active-contracts.ts

@@ -9,11 +9,7 @@ const MAX_ACTIVE_CONTRACTS = 75
 // TODO: Maybe store last activity time directly in the contract?
 // Pros: simplifies this code; cons: harder to tweak "activity" definition later
 function lastActivityTime(contract: Contract) {
-  return Math.max(
-    contract.resolutionTime || 0,
-    contract.lastUpdatedTime,
-    contract.createdTime
-  )
+  return Math.max(contract.resolutionTime || 0, contract.createdTime)
 }
 
 // Types of activity to surface: