Revert "An attempt to add decorator syntax to abi-router (#370)"

This reverts commit 22cf520.

pyteal/ast/router.py

@@ -1,5 +1,5 @@
 from dataclasses import dataclass, field, fields, astuple
-from typing import cast, Optional, Callable
+from typing import cast, Optional
 from enum import IntFlag
 
 from algosdk import abi as sdk_abi
@@ -511,35 +511,6 @@ def add_method_handler(
             method_signature, method_clear_state_cond, method_call
         )
 
-    def method(
-        self,
-        func: Callable = None,
-        /,
-        *,
-        overriding_name: str = None,
-        no_op: CallConfig = CallConfig.CALL,
-        opt_in: CallConfig = CallConfig.NEVER,
-        close_out: CallConfig = CallConfig.NEVER,
-        clear_state: CallConfig = CallConfig.NEVER,
-        update_application: CallConfig = CallConfig.NEVER,
-        delete_application: CallConfig = CallConfig.NEVER,
-    ):
-        def wrap(_func):
-            wrapped_subroutine = ABIReturnSubroutine(func)
-            call_configs = MethodConfig(
-                no_op=no_op,
-                opt_in=opt_in,
-                close_out=close_out,
-                clear_state=clear_state,
-                update_application=update_application,
-                delete_application=delete_application,
-            )
-            self.add_method_handler(wrapped_subroutine, overriding_name, call_configs)
-
-        if not func:
-            return wrap
-        return wrap(func)
-
     def contract_construct(self) -> sdk_abi.Contract:
         """A helper function in constructing contract JSON object.