The following buttons can be hidden from Quotes UI:
attachmentsButton
convertToDeal
creationWorkflowBack
creationWorkflowSubmitAndNext
deleteButton
duplicateButton
emailCalculableButton
exportDOCXButton
exportXLSXButton
importExportButton
markAsLost
submitButton
editButton
revokeButton
To hide a button, use this code:
quoteProcessor.setRenderInfo("deleteButton","hide",true)