transformers

ef2d4cd4 - Fix tf2.4 (#9120)

Fix tf2.4 (#9120) * Fix tests for TF 2.4 * Remove <2.4 limitation * Add version condition * Update tests/test_optimization_tf.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update tests/test_optimization_tf.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update tests/test_optimization_tf.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>