tools: remove max-len ESLint rule

[Trott]

The max-len rule often hampers readability rather than enhancing it. Few
developers are inconvenienced by lines longer than 80 characters. Let's
remove it.

[lpinca]

The max-len rule often hampers readability rather than enhancing it.

I disagree. Even Prettier recommends 80 characters per line.

[targos]

I agree with @lpinca, but I also agree with @Trott :D. Prettier recommends 80 characters per line but also says that its option is not the same as enforcing a max-len rule.
I'm not okay with entirely removing the rule but I'm open to allowing more characters per line, up to 120.

[Yu02]

I actually think that this is a good idea, or maybe we should keep it as a warning.

[benjamingr]

People in favour of max-length - what's the problem with using word-wrapping in the editor? Is that insufficient for readability?

[Trott]

I disagree. Even Prettier recommends 80 characters per line.

On the other hand, standard does not enforce any maximum line length whatsoever.

[lpinca]

People in favour of max-length - what's the problem with using word-wrapping in the editor? Is that insufficient for readability?

I think not all editors support wrapping at a specific column. Also code does not look the same if line breaks and indentions are missing.