Remove Text from RSP DropZone API (#6152)
* Remove Text from RSP DropZone API
* fix test and lint
* clean up aria labelledby formatting
* merge heading contexts, remove text from api
* fix tests
* remove text from rsp dropzone docs
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Co-authored-by: Robert Snow <rsnow@adobe.com>
Co-authored-by: Daniel Lu <dl1644@gmail.com>
