refactor(server): mime types (#3197)

* refactor(server): mime type check

* chore: open api

* chore: remove duplicate test

server/immich-openapi-specs.json

@@ -4866,10 +4866,6 @@
           "isArchived": {
             "type": "boolean"
           },
-          "mimeType": {
-            "type": "string",
-            "nullable": true
-          },
           "duration": {
             "type": "string"
           },
@@ -4915,7 +4911,6 @@
           "updatedAt",
           "isFavorite",
           "isArchived",
-          "mimeType",
           "duration",
           "checksum"
         ]