diff --git a/tasks/main.py b/tasks/main.py
index 574e29f8d9..6d8fc8f5fd 100644
--- a/tasks/main.py
+++ b/tasks/main.py
@@ -84,28 +84,6 @@ def get_tasks_args(parser):
                         help='Av.rank validation: how many other negatives to'
                         ' take from each question pool')
 
-    # parameters for the knowledgeable dialogue generation
-    group.add_argument("--sample-input-file", type=str, default=None,
-                       help='Get input from file instead of interactive mode, '
-                       'each line is an input.')
-    group.add_argument("--sample-output-file", type=str, default=None,
-                       help='Output file got from --sample-input-file')
-    group.add_argument('--prompt-file', type=str, default=None,
-                       help='prompting file')
-    group.add_argument('--prompt-type', type=str, default=None,
-                       help='prompt type (knowledge or response)')
-    group.add_argument('--num-prompt-examples', type=int, default=10,
-                       help='number of prompt examples')
-    group.add_argument('--guess-file', type=str, default=None,
-                       help='datapath for generated sentences')
-    group.add_argument('--answer-file', type=str, default=None,
-                       help='datapath for golden sentences')
-    group.add_argument('--out-seq-length', type=int, default=100,
-                       help='output sequence length')
-    group.add_argument('--api-prompt', default=False, action="store_true",
-                       help='setup model api for prompting')
-    group.add_argument('--megatron-api-url', type=str, default=None,
-                       help='url of the megatron api')
 
     return parser
 
@@ -130,10 +108,6 @@ def get_tasks_args(parser):
         from orqa.evaluate_orqa import main
     elif args.task in ['RET-FINETUNE-NQ']:
         from orqa.supervised.finetune import main
-    elif args.task == 'KNWL-DIALO-PROMPT':
-        from knwl_dialo.prompt import main
-    elif args.task == 'KNWL-DIALO-EVAL-F1':
-        from knwl_dialo.evaluate import main
     else:
         raise NotImplementedError('Task {} is not implemented.'.format(
             args.task))