unpin datasets in UT (#4079)

.github/workflows/nv-transformers-v100.yml

@@ -56,8 +56,6 @@ jobs:
           pip install .[testing]
           # find reqs used in ds integration tests
           find examples/pytorch -regextype posix-egrep -regex '.*(language-modeling|question-answering|summarization|image-classification|text-classification|translation).*/requirements.txt' -exec grep -v 'torch' {} \; | xargs -I {} pip install --upgrade {}
-          # force datasets version due to issues
-          pip install datasets==2.2.2
           # force protobuf version due to issues
           pip install "protobuf<4.21.0"
           pip list