refactor mux path routes

legend has it that if you refactor your code enough times, one day you
will finally be happy

admin/music/artisthttp.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"net/http"
 	"os"
-	"strings"
 
 	"arimelody-web/admin/core"
 	"arimelody-web/admin/templates"
@@ -16,14 +15,6 @@ func serveArtists(app *model.AppState) http.Handler {
     return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
         session := r.Context().Value("session").(*model.Session)
 
-        slices := strings.Split(strings.TrimPrefix(r.URL.Path, "/artists")[1:], "/")
-        artistID := slices[0]
-
-        if len(artistID) > 0 {
-            serveArtist(app, artistID).ServeHTTP(w, r)
-            return
-        }
-
         artists, err := controller.GetAllArtists(app.DB)
         if err != nil {
             fmt.Fprintf(os.Stderr, "WARN: Failed to fetch artists: %s\n", err)