* Remove contracts RPC

* update lockfile for {"polkadot", "substrate"}

* Remove unused imports

* Properly set a max proof size for cumulus test runtime

* Properly set a max proof size for common runtimes

* Properly set the max proof size for all runtimes

Co-authored-by: parity-processbot <>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>