Mitigate Apple Mail re-sync (both bodies and meta info)

internal/imap/user.go

@@ -42,9 +42,6 @@ type imapUser struct {
 	currentAddressLowercase string
 
 	appendInProcess sync.WaitGroup
-
-	eventLoopPausingCounter int
-	eventLoopPausingLocker  sync.Locker
 }
 
 // newIMAPUser returns struct implementing go-imap/user interface.
@@ -76,8 +73,6 @@ func newIMAPUser(
 		storeAddress: storeAddress,
 
 		currentAddressLowercase: strings.ToLower(address),
-
-		eventLoopPausingLocker: &sync.Mutex{},
 	}, err
 }
 
@@ -86,31 +81,6 @@ func (iu *imapUser) client() pmapi.Client {
 	return iu.user.GetTemporaryPMAPIClient()
 }
 
-// pauseEventLoop pauses event loop and increases the number of mailboxes which
-// is performing action forbidding event loop to run (such as FETCH which needs
-// UIDs to be stable and thus EXPUNGE cannot be done during the request).
-func (iu *imapUser) pauseEventLoop() {
-	iu.eventLoopPausingLocker.Lock()
-	defer iu.eventLoopPausingLocker.Unlock()
-
-	iu.eventLoopPausingCounter++
-	iu.storeUser.PauseEventLoop(true)
-}
-
-// unpauseEventLoop unpauses event loop but only if no other request is not
-// performing action forbidding event loop to run (see pauseEventLoop).
-func (iu *imapUser) unpauseEventLoop() {
-	iu.eventLoopPausingLocker.Lock()
-	defer iu.eventLoopPausingLocker.Unlock()
-
-	if iu.eventLoopPausingCounter > 0 {
-		iu.eventLoopPausingCounter--
-	}
-	if iu.eventLoopPausingCounter == 0 {
-		iu.storeUser.PauseEventLoop(false)
-	}
-}
-
 func (iu *imapUser) isSubscribed(labelID string) bool {
 	subscriptionExceptions := iu.backend.getCacheList(iu.storeUser.UserID(), SubscriptionException)
 	exceptions := strings.Split(subscriptionExceptions, ";")