fix: remove example eslint config

[hugomrdias]

This PR removes eslint config from webpack example to solve the missing esling-config-react when running aegir lint. This is one way to go.

Another option is to stop linting examples with aegir, and have them setup specific eslint configs.

Please give feedback about these two options and which one we should adopt.

Related:
https://github.com/ipfs/aegir/pull/293/files
#1665 (comment)

[vasco-santos]

I agree that we should go with this approach, instead of adding the eslint-plugin-react with all the aegir projects.

Moreover, Aegir should support custom configs according to the projects needs.

[hugomrdias]

There's already a this PR ipfs/aegir#250 about custom eslint configs support

[alanshaw]

I think we should stop linting the examples folder as part of the build for js-ipfs. The examples should have their own linting setup - they are essentially separate projects and we shouldn't let their dependencies leak into dependencies for js-ipfs.

They're going to need different linting rules because...react....so we can't really expect them to conform to linting for js-ipfs.