Try newer omegaconf

requirements.txt

@@ -10,7 +10,7 @@ matplotlib>=1.5.0
 # mypy 0.900+ required for pyproject.toml support
 mypy>=0.900
 numpy>=1.14.5
-omegaconf>=1.0.3
+omegaconf>=1.4.0
 opencv-python>=3.4.2.17
 pillow>=5.2.0
 pycocotools>=2.0.0
@@ -38,5 +38,3 @@ torch>=1.7
 torchmetrics>=0.2.0
 # torchvision 0.3+ required for download_file_from_google_drive
 torchvision>=0.3
-
-ruamel.yaml>=0.17.10