Change defaultMessage for spoiler placeholder (#4329)

app/javascript/mastodon/locales/defaultMessages.json

@@ -452,7 +452,7 @@
         "id": "compose_form.placeholder"
       },
       {
-        "defaultMessage": "Content warning",
+        "defaultMessage": "Write your warning here",
         "id": "compose_form.spoiler_placeholder"
       },
       {
@@ -965,27 +965,6 @@
     ],
     "path": "app/javascript/mastodon/features/public_timeline/index.json"
   },
-  {
-    "descriptors": [
-      {
-        "defaultMessage": "New report",
-        "id": "report.heading"
-      },
-      {
-        "defaultMessage": "Additional comments",
-        "id": "report.placeholder"
-      },
-      {
-        "defaultMessage": "Submit",
-        "id": "report.submit"
-      },
-      {
-        "defaultMessage": "Reporting",
-        "id": "report.target"
-      }
-    ],
-    "path": "app/javascript/mastodon/features/report/index.json"
-  },
   {
     "descriptors": [
       {