Remove deprecated kwargs

Removes unsupported (deprecated and unused) IPUConfig params from older configs (these will raise an error in latest build of Optimum Graphcore) (#1)

Update README.md

Update README.md

Update README.md

Update model description

Update BERT large uncased checkpoint after running phase 1 (SL 128) and phase 2 (SL 512)

first version of the model

initial commit