[RFC] Remove comparison with gometalinter, as it is archived

[thaJeztah]

Thank you for creating the issue!

• Yes, I'm using a binary release within 2 latest major releases. Only such installations are supported.
• Yes, I've searched similar issues on GitHub and didn't find any.
• Yes, I've included all information below (version, config, etc).

Please include the following information:

Version of golangci-lint

(not relevant)

Config file

(not relevant)

Go environment

(not relevant)

Verbose output of running

(not relevant)

The documentation and description of this repository contains a substantial amount of information to compare performance with Gometalinter.

Now that Gometalinter was deprecated, archived, and is recommending GolangCI-lint as alternative, I think the comparison (and comparing benchmarks) is no longer relevant, so might as well be removed.

[ernado]

Agree, PR is welcome.