Update navigation.json

Author: AugustinMauroy

apps/site/navigation.json

@@ -414,31 +414,6 @@
               "label": "components.navigation.learn.testRunner.links.collectingCodeCoverage"
             }
           }
-        },
-        "userland-migrations": {
-          "label": "components.navigation.learn.userland-migrations.links.userland-migrations",
-          "items": {
-            "introduction": {
-              "link": "/learn/userland-migrations/introduction",
-              "label": "components.navigation.learn.userland-migrations.links.introduction"
-            },
-            "ecosystem": {
-              "link": "/learn/userland-migrations/ecosystem",
-              "label": "components.navigation.learn.userland-migrations.links.ecosystem"
-            },
-            "v22-to-v24": {
-              "link": "/learn/userland-migrations/v22-to-v24",
-              "label": "components.navigation.learn.userland-migrations.links.v22-to-v24"
-            },
-            "v20-to-v22": {
-              "link": "/learn/userland-migrations/v20-to-v22",
-              "label": "components.navigation.learn.userland-migrations.links.v20-to-v22"
-            },
-            "v14-to-v16": {
-              "link": "/learn/userland-migrations/v14-to-v16",
-              "label": "components.navigation.learn.userland-migrations.links.v14-to-v16"
-            }
-          }
         }
       }
     }