Revert "Handle arrays of images when building prompts"#1559

Caitlin Pinn (cpinn) merged 1 commit intomainbraintrustdata/braintrust-sdk-javascript:mainfrom

revert-1247-caitlin/modify-nunjucks-parsing-to-match-custom-mustache-behaviorbraintrustdata/braintrust-sdk-javascript:revert-1247-caitlin/modify-nunjucks-parsing-to-match-custom-mustache-behaviorCopy head branch name to clipboard