Remove required data validator from form

app/forms.py

@@ -1,10 +1,9 @@
 from constants import DATASETS
 from flask_wtf import FlaskForm
 from wtforms import SelectField, SubmitField
-from wtforms.validators import DataRequired
 
 
 # NOTE The choices should be shorter
 class DatasetForm(FlaskForm):
-    dataset = SelectField(validators=[DataRequired()], choices=DATASETS)
+    dataset = SelectField(choices=DATASETS)
     submit = SubmitField("Submit")

shell.nix

@@ -13,7 +13,7 @@ pkgs.mkShell {
     matplotlib
     folium
     pytest
-    selenium
+    beautifulsoup4
     # Development tools
     black
     isort