simplify CI horovod

Author: Borda

tests/models/data/horovod/train_default_model.py

@@ -18,12 +18,6 @@
 
 import argparse
 import json
-import os
-import sys
-
-PATH_HERE = os.path.abspath(os.path.dirname(__file__))
-PATH_ROOT = os.path.abspath(os.path.join(PATH_HERE, '..', '..', '..', '..'))
-sys.path.insert(0, os.path.abspath(PATH_ROOT))
 
 from pytorch_lightning import Trainer  # noqa: E402
 from pytorch_lightning.callbacks import ModelCheckpoint  # noqa: E402
@@ -35,10 +29,6 @@
     print('You requested to import Horovod which is missing or not supported for your OS.')
 
 
-# Move project root to the front of the search path, as some imports may have reordered things
-idx = sys.path.index(PATH_ROOT)
-sys.path[0], sys.path[idx] = sys.path[idx], sys.path[0]
-
 from tests.base import EvalModelTemplate  # noqa: E402
 from tests.base.develop_pipelines import run_prediction  # noqa: E402
 from tests.base.develop_utils import set_random_master_port, reset_seed  # noqa: E402