Remove interpolate nans related code

Author: ibevers

src/tests/audio/tasks/forced_alignment_test.py

@@ -1,7 +1,5 @@
 """Tests for forced alignment functions."""
 
-import numpy as np
-import pandas as pd
 import pytest
 import torch
 from transformers import Wav2Vec2ForCTC, Wav2Vec2Processor
@@ -30,7 +28,6 @@
         _align_transcription,
         _can_align_segment,
         _get_prediction_matrix,
-        _interpolate_nans,
         _merge_repeats,
         _preprocess_segments,
         align_transcriptions,
@@ -390,14 +387,6 @@ def test_merge_repeats() -> None:
     assert len(segments) == 2
 
 
-@pytest.mark.skipif(not TORCHAUDIO_AVAILABLE, reason="torchaudio is not installed")
-def test_interpolate_nans() -> None:
-    """Test interpolation of NaN values."""
-    series = pd.Series([0.0, np.nan, 2.0])
-    interpolated_series = _interpolate_nans(series)
-    assert interpolated_series.isnull().sum() == 0
-
-
 @pytest.mark.skipif(not TORCHAUDIO_AVAILABLE, reason="torchaudio is not installed")
 @pytest.mark.skipif(not torch.cuda.is_available(), reason="GPU is not available")
 def test_get_prediction_matrix(dummy_model: tuple) -> None: