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_basic.py

@@ -342,7 +342,6 @@ class WalletTest(BitcoinTestFramework):
 
         self.sync_all()
         self.generate(self.nodes[1], 1)  # mine a block
-        self.sync_all()
 
         unspent_txs = self.nodes[0].listunspent()  # zero value tx must be in listunspents output
         found = False