simplified requirements

requirements.txt

@@ -8,11 +8,7 @@ charset-normalizer==2.0.9
 click==7.1.2
 cycler==0.11.0
 cymem==2.0.6
-en-core-web-lg @ https://github.com/explosion/spacy-models/releases/download/en_core_web_lg-3.0.0/en_core_web_lg-3.0.0-py3-none-any.whl
-en-core-web-md @ https://github.com/explosion/spacy-models/releases/download/en_core_web_md-3.0.0/en_core_web_md-3.0.0-py3-none-any.whl
-en-core-web-sm @ https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.0.0/en_core_web_sm-3.0.0-py3-none-any.whl
-en-ner-bc5cdr-md @ https://s3-us-west-2.amazonaws.com/ai2-s2-scispacy/releases/v0.4.0/en_ner_bc5cdr_md-0.4.0.tar.gz
-en-ner-bionlp13cg-md @ https://s3-us-west-2.amazonaws.com/ai2-s2-scispacy/releases/v0.4.0/en_ner_bionlp13cg_md-0.4.0.tar.gz
+altair<5
 et-xmlfile==1.1.0
 flatbuffers==2.0
 fonttools==4.28.5