enh: simplify base interface

@@ -99,33 +99,10 @@ def help(cls, returnhelp=False):
 print(allhelp)
 return None # R1710
 
-def __init__(self):
-"""Subclasses must implement __init__"""
-raise NotImplementedError
-
 def run(self):
 """Execute the command."""
 raise NotImplementedError
 
-def aggregate_outputs(self, runtime=None, needed_outputs=None):
-"""Called to populate outputs"""
-raise NotImplementedError
-
-def _list_outputs(self):
-""" List expected outputs"""
-raise NotImplementedError
-
-@classmethod
-def _get_filecopy_info(cls):
-"""Provides information about file inputs to copy or link to cwd.
-Necessary for pipeline operation
-"""
-iflogger.warning(
-"_get_filecopy_info member of Interface was deprecated "
-"in nipype-1.1.6 and will be removed in 1.2.0"
-)
-return get_filecopy_info(cls)
-
 
 class BaseInterface(Interface):
 """Implement common interface functionality.