chore(linting): fixed unnessary use of fmt.Errorf

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (fae44d9) 81.52% compared to head (23841e8) 83.46%. Report is 7 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #122 +/- ## ========================================== + Coverage 81.52% 83.46% +1.94% ========================================== Files 12 12 Lines 2035 1766 -269 ========================================== - Hits 1659 1474 -185 + Misses 297 213 -84 Partials 79 79 ``` | [Flag](https://app.codecov.io/gh/go-openapi/strfmt/pull/122/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-openapi) | Coverage Δ | | |---|---|---| | [oldstable](https://app.codecov.io/gh/go-openapi/strfmt/pull/122/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-openapi) | `83.46% <100.00%> (+1.94%)` | :arrow_up: | | [stable](https://app.codecov.io/gh/go-openapi/strfmt/pull/122/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-openapi) | `83.46% <100.00%> (+1.94%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-openapi#carryforward-flags-in-the-pull-request-comment) to find out more.

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