Remove useless valid-fail $$matchAsRoot test

Author: jmikola

source/unified-test-format/tests/valid-fail/operator-matchAsRoot.json

@@ -19,11 +19,10 @@ initialData:
     databaseName: *database0Name
     documents:
       - { _id: 1, x: { y: 2, z: 3 } }
-      - { _id: 2, x: '{ "x": 1, "y": 2.0 }' }
 
 tests:
   -
-    description: matchAsRoot with nested document
+    description: matchAsRoot with nested document does not match
     operations:
       - name: find
         object: *collection0
@@ -32,13 +31,3 @@ tests:
           limit: 1
         expectResult:
           - { _id: 1, x: { $$matchAsRoot: { y: 3 } } }
-  -
-    description: matchAsRoot with matchAsDocument
-    operations:
-      - name: find
-        object: *collection0
-        arguments:
-          filter: { _id : 1 }
-          limit: 1
-        expectResult:
-          - { _id: 2, x: { $$matchAsDocument: { $$matchAsRoot: { x: 1 } } } }