scripted-diff: Remove redundant sync_all and sync_blocks

The sync calls are redundant after a call to generate, because generate
already syncs itself.

-BEGIN VERIFY SCRIPT-
perl -0777 -pi -e 's/(generate[^\n]*\)[^\n]*)(\n|\s)+self.sync_(all|blocks)\([^\)]*\)\n/\1\n/g' $(git grep -l generate ./test)
-END VERIFY SCRIPT-

test/functional/feature_notifications.py

@@ -112,7 +112,6 @@ class NotificationsTest(BitcoinTestFramework):
             self.log.info("test -walletnotify with conflicting transactions")
             self.nodes[0].rescanblockchain()
             self.generatetoaddress(self.nodes[0], 100, ADDRESS_BCRT1_UNSPENDABLE)
-            self.sync_blocks()
 
             # Generate transaction on node 0, sync mempools, and check for
             # notification on node 1.