delete outdated upgrade procedures

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 84.38%. Comparing base (41baa87) to head (c4098ca).

Files with missing lines	Patch %	Lines
controllers/limitador_controller.go	57.14%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #162 +/- ## ========================================== - Coverage 84.73% 84.38% -0.36% ========================================== Files 19 18 -1 Lines 1009 967 -42 ========================================== - Hits 855 816 -39 + Misses 102 100 -2 + Partials 52 51 -1 ``` | [Flag](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `78.17% <57.14%> (-0.62%)` | :arrow_down: | | [unit](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `65.14% <ø> (-0.53%)` | :arrow_down: | 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=Kuadrant#carryforward-flags-in-the-pull-request-comment) to find out more. | [Components](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | Coverage Δ | | |---|---|---| | [api/v1alpha1 (u)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `100.00% <ø> (ø)` | | | [pkg/helpers (u)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `80.64% <ø> (-3.23%)` | :arrow_down: | | [pkg/log (u)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `94.73% <ø> (ø)` | | | [pkg/reconcilers (u)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `73.52% <ø> (ø)` | | | [pkg/limitador (u)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `98.11% <ø> (ø)` | | | [controllers (i)](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `75.25% <57.14%> (-0.49%)` | :arrow_down: | | [pkg/upgrades](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | `∅ <ø> (∅)` | | | [Files with missing lines](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant) | Coverage Δ | | |---|---|---| | [controllers/limitador\_controller.go](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162?src=pr&el=tree&filepath=controllers%2Flimitador_controller.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant#diff-Y29udHJvbGxlcnMvbGltaXRhZG9yX2NvbnRyb2xsZXIuZ28=) | `73.73% <57.14%> (+1.08%)` | :arrow_up: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/Kuadrant/limitador-operator/pull/162/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kuadrant)