SQSERVICES 1239 remove unused locale setting in brig's values.yaml

[battermann]

https://wearezeta.atlassian.net/browse/SQSERVICES-1239

Checklist

• The PR Title explains the impact of the change.
• The PR description provides context as to why the change should occur and what the code contributes to that effect. This could also be a link to a JIRA ticket or a Github issue, if there is one.
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[pcapriotti]

I don't know the context for this, but I'm assuming it's just an option that is not used anymore?

[battermann]

I don't know the context for this, but I'm assuming it's just an option that is not used anymore?

Kind of, the option has a hard coded default. And since overwriting by helm template is not supported, it can better be removed to avoid confusion.