Update apiDefinition.swagger.json (#1985)

custom-connectors/Facebook/apiDefinition.swagger.json

@@ -126,7 +126,6 @@
             "x-ms-dynamic-values": {
               "operationId": "GetMyPages",
               "parameters": {
-                "Accept": "application/json"
               },
               "value-collection": "data",
               "value-path": "id",
@@ -205,7 +204,6 @@
             "x-ms-dynamic-values": {
               "operationId": "GetMyPages",
               "parameters": {
-                "Accept": "application/json"
               },
               "value-collection": "data",
               "value-path": "id",