feanil/some maintenance

[feanil]

• chore: Update pylintrc and .editorconfig from edx-lint
• style: Remove useless pylint supression.

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (4b13d3e) 97.84% compared to head (11b89c5) 97.84%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #425 +/- ## ======================================= Coverage 97.84% 97.84% ======================================= Files 77 77 Lines 6696 6696 ======================================= Hits 6552 6552 Misses 144 144 ``` | [Flag](https://app.codecov.io/gh/openedx/xblock-lti-consumer/pull/425/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/openedx/xblock-lti-consumer/pull/425/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | `97.84% <0.00%> (ø)` | | 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=openedx#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/openedx/xblock-lti-consumer/pull/425?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | Coverage Δ | | |---|---|---| | [lti\_consumer/lti\_xblock.py](https://app.codecov.io/gh/openedx/xblock-lti-consumer/pull/425?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-bHRpX2NvbnN1bWVyL2x0aV94YmxvY2sucHk=) | `96.08% <0.00%> (ø)` | |

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