x/staking: Fix all linter warnings.
Fixed warnings across base packages.
New linters:
- unparam
- nolintlint
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
Gaia is removed from cosmos-sdk repository.
Few changes were required to make sure no packages depend on gaia subpackages.
CI config is amended accordingly.
Unnecessary targets are removed from Makefile.
Simulations run through a lightweight version of gaia renamed to simapp.
Closes: #4104