Cleanup extra files (#9)

removes extra/dead files from repo:
- pipfile is obsolete
- .cpp file in utils is auto-generated on install, not needed in repo

---------

Signed-off-by: peter szemraj <peterszemraj@gmail.com>

Author: pszemraj

.gitignore

@@ -2,6 +2,7 @@
 hf_model/
 checkpoints/
 /data/
+annotated_mpnet/utils/*.cpp
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
@@ -131,4 +132,4 @@ venv.bak/
 dmypy.json
 
 # Pyre type checker
-.pyre/
+.pyre/