Clean up ahead of PR.

SignalServiceKit/src/Messages/OWSMessageDecrypter.m

@@ -236,9 +236,8 @@ NS_ASSUME_NONNULL_BEGIN
         return;
     }
 
-    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-        [TSStorageManager.protocolStoreDBConnection readWriteWithBlock:^(
-            YapDatabaseReadWriteTransaction *_Nonnull transaction) {
+    [TSStorageManager.protocolStoreDBConnection
+        asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
             @try {
                 id<CipherMessage> cipherMessage = cipherMessageBlock(encryptedData);
                 SessionCipher *cipher = [[SessionCipher alloc] initWithSessionStore:storageManager
@@ -260,7 +259,6 @@ NS_ASSUME_NONNULL_BEGIN
                 });
             }
         }];
-    });
 }
 
 - (void)processException:(NSException *)exception envelope:(OWSSignalServiceProtosEnvelope *)envelope

SignalServiceKit/src/Messages/OWSMessageSender.m

@@ -1105,7 +1105,7 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
     }
 
     [TSStorageManager.protocolStoreDBConnection
-        readWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
+        asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
             if (extraDevices.count < 1 && missingDevices.count < 1) {
                 OWSProdFail([OWSAnalyticsEvents messageSenderErrorNoMissingOrExtraDevices]);
             }
@@ -1436,7 +1436,8 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
             return;
         }
 
-        [TSStorageManager.protocolStoreDBConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
+        [TSStorageManager.protocolStoreDBConnection asyncReadWriteWithBlock:^(
+            YapDatabaseReadWriteTransaction *transaction) {
             for (NSUInteger i = 0; i < [devices count]; i++) {
                 int deviceNumber = [devices[i] intValue];
                 [[TSStorageManager sharedManager] deleteSessionForContact:identifier