revert: extra files

Author: tswast

bigframes/__init__.py

@@ -32,9 +32,6 @@
 )
 import bigframes.enums as enums  # noqa: E402
 import bigframes.exceptions as exceptions  # noqa: E402
-
-# Register pandas extensions
-import bigframes.extensions.pandas.dataframe_accessor  # noqa: F401, E402
 from bigframes.session import connect, Session  # noqa: E402
 from bigframes.version import __version__  # noqa: E402
 

bigframes/extensions/__init__.py

@@ -19,16 +19,6 @@ packages.
     bigframes.pandas.api.typing
     bigframes.streaming
 
-Pandas Extensions
-~~~~~~~~~~~~~~~~~
-
-BigQuery DataFrames provides extensions to pandas DataFrame objects.
-
-.. autosummary::
-    :toctree: api
-
-    bigframes.extensions.pandas.dataframe_accessor.BigQueryDataFrameAccessor
-
 ML APIs
 ~~~~~~~