refactor: drop the quiz import and the golem15.quizzes dependency

golem15.quizzes now serves its own import at /api/v1/quizzes/import behind
the same shared API token.

controllers/api/manage.go

@@ -12,7 +12,6 @@ import (
 	"time"
 	"unicode"
 
-	quizzes "git.golem15.com/golem15/sm-quizzes-plugin/classes"
 	usermodels "git.golem15.com/golem15/sm-user-plugin/models"
 	"git.golem15.com/golem15/summercms/modules/bouncer"
 	"git.golem15.com/golem15/summercms/modules/lagoon"
@@ -134,41 +133,6 @@ func (h *Handlers) ApplySeed(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
-// ImportQuiz answers POST /quizzes?replace=: quizzes:import over HTTP. The
-// body is the quiz document of golem15.quizzes. An existing slug is a 409
-// unless replace is on.
-func (h *Handlers) ImportQuiz(w http.ResponseWriter, r *http.Request) {
-	raw, ok := body(w, r)
-	if !ok {
-		return
-	}
-	doc, err := quizzes.ParseImport(raw)
-	if err != nil {
-		writeInvalid(w, err.Error())
-		return
-	}
-	db, ok := h.db(w, r)
-	if !ok {
-		return
-	}
-	res, err := quizzes.Import(r.Context(), db, doc, flag(r, "replace"))
-	if errors.Is(err, quizzes.ErrQuizExists) {
-		wire.WriteJSON(w, http.StatusConflict, map[string]any{"error": true, "message": "A quiz with the slug " + doc.Slug + " already exists; pass replace=1 to replace its questions."})
-		return
-	}
-	if err != nil {
-		writeOpaque500(w)
-		return
-	}
-	writeData(w, map[string]any{
-		"id":        res.Quiz.ID,
-		"slug":      res.Quiz.Slug,
-		"created":   res.Created,
-		"questions": res.Questions,
-		"answers":   res.Answers,
-	})
-}
-
 // managedMaterialJSON is a material as the management API shows it: drafts
 // too, so published_at may be null.
 type managedMaterialJSON struct {