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_listsinceblock.py

@@ -31,7 +31,6 @@ class ListSinceBlockTest(BitcoinTestFramework):
         # only one connection. (See fPreferredDownload in net_processing)
         self.connect_nodes(1, 2)
         self.generate(self.nodes[2], COINBASE_MATURITY + 1)
-        self.sync_all()
 
         self.test_no_blockhash()
         self.test_invalid_blockhash()
@@ -198,7 +197,6 @@ class ListSinceBlockTest(BitcoinTestFramework):
         address = key_to_p2wpkh(eckey.get_pubkey().get_bytes())
         self.nodes[2].sendtoaddress(address, 10)
         self.generate(self.nodes[2], 6)
-        self.sync_all()
         self.nodes[2].importprivkey(privkey)
         utxos = self.nodes[2].listunspent()
         utxo = [u for u in utxos if u["address"] == address][0]