[GH Request] Remove archived XBlock resources from openedx-translations on Transifex

[!NOTE]
This issue was drafted with Claude. It has been human-reviewed, but some technical details may have drifted due lack of transifex access — please flag anything that looks off.

Firm Name: Axim
Urgency: Low (2 weeks)

Problem/Request

Per the OEP-14 archive steps, please delete the hosted Transifex resources for seven deprecated XBlocks from the openedx-translations project. Their transifex.yml entries were already removed in #73194 and #74375, which stops future sync but leaves the resources live on Transifex.

Resources to remove (source dir → repo):

• translations/AudioXBlock/audio/conf/locale/en/ — AudioXBlock
• translations/FeedbackXBlock/feedback/conf/locale/en/ — FeedbackXBlock
• translations/xblock-image-modal/imagemodal/conf/locale/en/ — image-modal
• translations/xblock-qualtrics-survey/qualtricssurvey/conf/locale/en/ — qualtrics-survey
• translations/xblock-sql-grader/sql_grader/conf/locale/en/ — sql-grader
• translations/xblock-submit-and-compare/.../conf/locale/en/ — submit-and-compare
• translations/xblock-free-text-response/freetextresponse/conf/locale/en/ — xblock-free-text-response

Reasoning

All seven are archived and consolidated into openedx/xblocks-extra. Deprecation is tracked in public-engineering#565. This is the final outstanding archive step for each.