Del outdated OMZ model

Author: sovrasov

tests/python/accuracy/public_scope.json

@@ -145,16 +145,6 @@
       }
     ]
   },
-  {
-    "name": "resnet-18-pytorch",
-    "type": "ClassificationModel",
-    "test_data": [
-      {
-        "image": "coco128/images/train2017/000000000074.jpg",
-        "reference": ["254 (pug): 0.153, [0], [0], [0]"]
-      }
-    ]
-  },
   {
     "name": "efficientnet-b0-pytorch",
     "type": "ClassificationModel",