Remove reference to clock_id on the function descriptiions

Author: C47D

shared-bindings/time/__init__.c

@@ -208,8 +208,7 @@ MP_DEFINE_CONST_FUN_OBJ_0(time_time_obj, time_time);
 
 //| .. method:: monotonic_ns()
 //|
-//|   Return the time of the specified clock clk_id in nanoseconds. Refer to
-//|   Clock ID Constants for a list of accepted values for clk_id.
+//|   Return the time of the specified clock clk_id in nanoseconds.
 //|
 //|   :return: the current time
 //|   :rtype: int