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/mining_getblocktemplate_longpoll.py

@@ -64,7 +64,6 @@ class GetBlockTemplateLPTest(BitcoinTestFramework):
 
         # Add enough mature utxos to the wallets, so that all txs spend confirmed coins
         self.generate(self.nodes[0], COINBASE_MATURITY)
-        self.sync_blocks()
 
         self.log.info("Test that introducing a new transaction into the mempool will terminate the longpoll")
         thr = LongpollThread(self.nodes[0])