Remove PiecewiseAffine augmentation transform

Closes #125 (closed)

docs/usage/train/augmentation.md

@@ -15,6 +15,7 @@ This page lists data augmentation transforms used in DAN.
 | CPU time (seconds/10 images) | 0.44 (3013x128 pixels) / 0.86 (1116x581 pixels)                                                                                                                                                |
 
 ### PieceWise Affine
+:warning: This transform is temporarily removed from the pipeline until [this issue](https://github.com/albumentations-team/albumentations/issues/1442) is fixed.
 
 |                              | PieceWise Affine                                                                                                                                                                              |
 | ---------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
@@ -128,7 +129,6 @@ This page lists data augmentation transforms used in DAN.
 
 * Data augmentation is applied with a probability of 0.9.
 * In this case, two transformations are randomly selected to be applied.
-*  `ElasticTransform` and `PieceWiseAffine` cannot be applied on the same image.
 * Reproducibility is possible by setting `random.seed` and `np.random.seed` (already done in `dan/ocr/document/train.py`)
 * Examples with new pipeline: