remove invalid links from test data

Author: matthewhanson

tests/data-files/file/file-example.json

@@ -81,20 +81,5 @@
       "file:nodata": []
     }
   },
-  "links": [
-    {
-      "rel": "self",
-      "href": "https://example.com/collections/sentinel-1/items/S1A_EW_GRDM_1SSH_20181103T235855_20181103T235955_024430_02AD5D_5616"
-    },
-    {
-      "rel": "parent",
-      "href": "https://example.com/collections/sentinel-1",
-      "file:checksum": "11146d97123fd2c02dec9a1b6d3b13136dbe600cf966"
-    },
-    {
-      "rel": "root",
-      "href": "https://example.com/collections",
-      "file:checksum": "1114fa4b9d69fdddc7c1be7bed9440621400b383b43f"
-    }
-  ]
+  "links": []
 }