add extended trained electra model

- only torch model
- removed old tf model
- have to add converted tf model later

pytorch_model.bin

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:88eafd714105644160330338518a55acfdc4bbe678c354de656964eec12ea5af
-size 444881731
+oid sha256:a13cf267dfad08dd5c889af59f2e7f74120ff28107619d6c81904c3250efe76e
+size 444916553

tf_model.h5

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bac13badafe68532e6fb78eba50a48721279874e4ce7b39e66a8957ca84d98bc
-size 547488572