scripted-diff: test: Remove brackets after assert

-BEGIN VERIFY SCRIPT-
sed -i --regexp-extended -e 's/assert ?\((.+)\)(( )*)?(#.*)?$/assert \1\3\3\4/g' $(git grep -l --extended-regexp 'assert ?\(' test)
-END VERIFY SCRIPT-

test/functional/p2p_leak.py

@@ -117,9 +117,9 @@ class P2PLeakTest(BitcoinTestFramework):
         wait_until(lambda: len(self.nodes[0].getpeerinfo()) == 0)
 
         # Make sure no unexpected messages came in
-        assert(no_version_bannode.unexpected_msg == False)
-        assert(no_version_idlenode.unexpected_msg == False)
-        assert(no_verack_idlenode.unexpected_msg == False)
+        assert no_version_bannode.unexpected_msg == False
+        assert no_version_idlenode.unexpected_msg == False
+        assert no_verack_idlenode.unexpected_msg == False
 
 
 if __name__ == '__main__':