[lint] Remove [Cadence 1.0] from Cadence V1 Diagnostics

[jribbink]

Closes #314

Description

Adding this was an oversight and ends up causing more harm than the value it provides. IMO we should instead rely on clients to add this information if they need it (based on the category), and adding this only pollutes the diagnostic message.

I'll make a PR to add this messaging to the language server after this is merged

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