remove tests that are not valid for draft7

There is no order of evaluation between $id and $ref in draft7, as all other
keywords are ignored when $ref is present.

Author: karenetheridge

tests/draft7/ref.json

@@ -644,69 +644,5 @@
                 "valid": false
             }
         ]
-    },
-    {
-        "description": "order of evaluation: $id and $ref",
-        "schema": {
-            "$comment": "$id must be evaluated before $ref to get the proper $ref destination",
-            "$id": "/ref-and-id1/base.json",
-            "$ref": "int.json",
-            "$defs": {
-                "bigint": {
-                    "$comment": "canonical uri: /ref-and-id1/int.json",
-                    "$id": "int.json",
-                    "maximum": 10
-                },
-                "smallint": {
-                    "$comment": "canonical uri: /ref-and-id1-int.json",
-                    "$id": "/ref-and-id1-int.json",
-                    "maximum": 2
-                }
-            }
-        },
-        "tests": [
-            {
-                "description": "data is valid against first definition",
-                "data": 5,
-                "valid": true
-            },
-            {
-                "description": "data is invalid against first definition",
-                "data": 50,
-                "valid": false
-            }
-        ]
-    },
-    {
-        "description": "order of evaluation: $id and $anchor and $ref",
-        "schema": {
-            "$comment": "$id must be evaluated before $ref to get the proper $ref destination",
-            "$id": "/ref-and-id2/base.json",
-            "$ref": "#bigint",
-            "$defs": {
-                "bigint": {
-                    "$comment": "canonical uri: /ref-and-id2/base.json/$defs/bigint; another valid uri for this location: /ref-and-id2/base.json#bigint",
-                    "$id": "#bigint",
-                    "maximum": 10
-                },
-                "smallint": {
-                    "$comment": "canonical uri: /ref-and-id2#/$defs/smallint; another valid uri for this location: /ref-and-id2/#bigint",
-                    "$id": "/#bigint",
-                    "maximum": 2
-                }
-            }
-        },
-        "tests": [
-            {
-                "description": "data is valid against first definition",
-                "data": 5,
-                "valid": true
-            },
-            {
-                "description": "data is invalid against first definition",
-                "data": 50,
-                "valid": false
-            }
-        ]
     }
 ]