Fix RuntimeWarning: 'tf2onnx.convert' found in sys.modules after import of package 'tf2onnx', but prior to execution of 'tf2onnx.convert'

Signed-off-by: Adraub <adraub@gmail.com>

Author: Adraub

tf2onnx/__init__.py

@@ -8,4 +8,3 @@
 import onnx
 from .version import git_version, version as __version__
 from . import verbose_logging as logging
-from tf2onnx import tfonnx, utils, graph, graph_builder, graph_matcher, shape_inference, schemas, convert  # pylint: disable=wrong-import-order