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/p2p_ibd_txrelay.py

@@ -30,7 +30,6 @@ class P2PIBDTxRelayTest(BitcoinTestFramework):
 
         # Come out of IBD by generating a block
         self.generate(self.nodes[0], 1)
-        self.sync_all()
 
         self.log.info("Check that nodes reset minfilter after coming out of IBD")
         for node in self.nodes: