CI: Remove unnecessary pipes (#9681)

* ci: reduce gitlab pipelines significantly

* ci: build pipeline for PR

* ci: remove dead weight

* ci: remove github release script

* ci: remove forever broken aura tests

* ci: add random stuff to the end of the pipes

* ci: add wind and mac to the end of the pipe

* ci: remove snap artifacts

* ci: (re)move dockerfiles

* ci: clarify job names

* ci: add cargo audit job

* ci: make audit script executable

* ci: ignore snap and docker files for rust check

* ci: simplify audit script

* ci: rename misc to optional

* ci: add publish script to releaseable branches

* ci: more verbose cp command for windows build

* ci: fix weird binary checksum logic in push script

* ci: fix regex in push script for windows

* ci: simplify gitlab caching

* docs: align README with ci changes

* ci: specify default cargo target dir

* ci: print verbose environment

* ci: proper naming of scripts

* ci: restore docker files

* ci: use docker hub file

* ci: use cargo home instead of cargo target dir

* ci: touch random rust file to trigger real builds

* ci: set cargo target dir for audit script

* ci: remove temp file

* ci: don't export the cargo target dir in the audit script

* ci: fix windows unbound variable

* docs: fix gitlab badge path

* rename deprecated gitlab ci variables

https://docs.gitlab.com/ee/ci/variables/#9-0-renaming

* ci: fix git compare for nightly builds

* test: skip c++ example for all platforms but linux

* ci: add random rust file to trigger tests

* ci: remove random rust file

* disable cpp lib test for mac, win and beta (#9686)

Author: 5chdn

.gitlab-ci.yml

@@ -4,9 +4,7 @@
 
 <p align="center"><strong><a href="https://github.com/paritytech/parity-ethereum/releases/latest">» Download the latest release «</a></strong></p>
 
-<p align="center"><a href="https://gitlab.parity.io/parity/parity/commits/master" target="_blank"><img src="https://gitlab.parity.io/parity/parity/badges/master/build.svg" /></a>
-<a href="https://codecov.io/gh/paritytech/parity-ethereum" target="_blank"><img src="https://codecov.io/gh/paritytech/parity-ethereum/branch/master/graph/badge.svg" /></a>
-<a href="https://build.snapcraft.io/user/paritytech/parity" target="_blank"><img src="https://build.snapcraft.io/badge/paritytech/parity.svg" /></a>
+<p align="center"><a href="https://gitlab.parity.io/parity/parity-ethereum/commits/master" target="_blank"><img src="https://gitlab.parity.io/parity/parity-ethereum/badges/master/build.svg" /></a>
 <a href="https://www.gnu.org/licenses/gpl-3.0.en.html" target="_blank"><img src="https://img.shields.io/badge/license-GPL%20v3-green.svg" /></a></p>
 
 **Built for mission-critical use**: Miners, service providers, and exchanges need fast synchronisation and maximum uptime. Parity Ethereum provides the core infrastructure essential for speedy and reliable services.
@@ -60,26 +58,6 @@ Once you have `rustup` installed, then you need to install:
 
 Make sure that these binaries are in your `PATH`. After that, you should be able to build Parity Ethereum from source.
 
-## Install from the Snapcraft Store
-
-In any of the [supported Linux distros](https://snapcraft.io/docs/core/install):
-
-```bash
-sudo snap install parity
-```
-
-Alternatively, if you want to contribute testing the upcoming release:
-
-```bash
-sudo snap install parity --beta
-```
-
-Moreover, to test the latest code from the master branch:
-
-```bash
-sudo snap install parity --edge
-```
-
 ## Build from Source Code
 
 ```bash