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_importprunedfunds.py

@@ -27,8 +27,6 @@ class ImportPrunedFundsTest(BitcoinTestFramework):
         self.log.info("Mining blocks...")
         self.generate(self.nodes[0], COINBASE_MATURITY + 1)
 
-        self.sync_all()
-
         # address
         address1 = self.nodes[0].getnewaddress()
         # pubkey