docs(readme): remove duplicated instructions

[toshihidetagami]

Platforms affected

only documentation

Description

Line 86,87 is possible duplication to line 84, 85.

Testing

Reviewed the diff

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[janpio]

Good catch!