chore: removed image building files that are in Iron Bank repo

Please check if the MR fulfills these requirements

• The commit message follows our guidelines [https://www.conventionalcommits.org/en/v1.0.0-beta.3/#specification]
• Docs have been added / updated (for bug fixes / features)

What kind of change does this MR introduce? (Bug fix, feature, testing capability, docs update, ...)

removes files no longer needed; updates README

Does this MR introduce a breaking change? (What changes might users need to make in their application due to this MR?)

no, but chart location change in previous MR was already a breaking change

Prerequisites:

None