datafactory, clean directive after Dapeng (#17016)

Author: weidongxu-microsoft

specification/datafactory/resource-manager/readme.java.md

@@ -10,18 +10,6 @@ namespace: com.microsoft.azure.management.datafactory
 license-header: MICROSOFT_MIT_NO_CODEGEN
 payload-flattening-threshold: 1
 output-folder: $(azure-libraries-for-java-folder)/azure-mgmt-datafactory
-
-directive:
-  - from: ManagedPrivateEndpoint.json
-    where: "$.definitions.ManagedPrivateEndpoint"
-    transform: delete $.discriminator
-  - from: ManagedVirtualNetwork.json
-    where: "$.definitions.ManagedVirtualNetwork"
-    transform: delete $.discriminator
-  - from: DataFlow.json
-    where: "$.definitions.DataFlow"
-    transform: $.required = ['type']
-    reason: discriminator property must be required
 ```
 
 # Validation

specification/datafactory/resource-manager/readme.python.md

@@ -42,16 +42,4 @@ directive:
     where: $.definitions.ScriptAction.properties.roles
     transform: >
         $['type'] = 'string';
-  - from: swagger-document
-    where: $.definitions.DataFlow
-    transform: >
-        $['required'] = ['type'];  
-  - from: swagger-document
-    where: $.definitions.ManagedPrivateEndpoint
-    transform: >
-        $['required'] = ['type'];  
-  - from: swagger-document
-    where: $.definitions.ManagedVirtualNetwork
-    transform: >
-        $['required'] = ['type'];  
 ```