Rubocop: fix Lint/SuppressedException error
Rubocop: fix Lint/SuppressedException error

It doesn't look like we need to wrap this in a rescue block. I
can't see any reason it was needed in the original commit:
https://github.com/alphagov/govuk-developer-docs/commit/5d9cf718dabea7f6029a1981cbd3f2fe59ad61df

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs