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/wallet_txn_clone.py

@@ -129,7 +129,6 @@ class TxnMallTest(BitcoinTestFramework):
         self.nodes[2].sendrawtransaction(node0_tx2["hex"])
         self.nodes[2].sendrawtransaction(tx2["hex"])
         self.generate(self.nodes[2], 1)  # Mine another block to make sure we sync
-        self.sync_blocks()
 
         # Re-fetch transaction info:
         tx1 = self.nodes[0].gettransaction(txid1)