Remove gancio fixture picture as the server is down

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

test/federation/activity_pub/transmogrifier_test.exs

@@ -128,8 +128,8 @@ defmodule Mobilizon.Federation.ActivityPub.TransmogrifierTest do
       assert event.title == "Demo event"
       assert event.begins_on == ~U[2021-07-14 15:30:57Z]
       assert event.ends_on == ~U[2021-07-14 16:30:57Z]
-      assert event.picture.file.content_type == "image/jpeg"
-      assert event.picture.file.name == "unknown.jpg"
+      # assert event.picture.file.content_type == "image/jpeg"
+      # assert event.picture.file.name == "unknown.jpg"
       assert length(event.tags) == 1
       assert hd(event.tags).title == "test"
       assert event.physical_address.description == "Colosseo"

test/fixtures/gancio-event-activity.json

@@ -15,16 +15,6 @@
     "location": {
       "name": "Colosseo"
     },
-    "attachment": [
-      {
-        "type": "Document",
-        "mediaType": "image/jpeg",
-        "url": "https://demo.gancio.org/media/7215892e7326a9b326b6bcad5b57642e.jpg",
-        "name": "",
-        "blurHash": null,
-        "focalPoint": [0, 0]
-      }
-    ],
     "tag": [
       {
         "type": "Hashtag",