Remove dep on unidecode (#6673)

Not needed anymore in py3

requirements.txt

@@ -92,7 +92,6 @@ thrift-sasl==0.3.0
 thrift==0.11.0
 tornado==5.1.1            # via flower
 unicodecsv==0.14.1
-unidecode==1.0.22
 urllib3==1.22             # via requests, selenium
 vine==1.1.4               # via amqp
 webencodings==0.5.1       # via bleach

setup.py

@@ -94,7 +94,6 @@ setup(
         'thrift>=0.9.3',
         'thrift-sasl>=0.2.1',
         'unicodecsv',
-        'unidecode>=0.04.21',
     ],
     extras_require={
         'cors': ['flask-cors>=2.0.0'],

superset/views/core.py

@@ -23,7 +23,6 @@ import sqlalchemy as sqla
 from sqlalchemy import and_, create_engine, MetaData, or_, update
 from sqlalchemy.engine.url import make_url
 from sqlalchemy.exc import IntegrityError
-from unidecode import unidecode
 from werkzeug.routing import BaseConverter
 from werkzeug.utils import secure_filename
 
@@ -2614,8 +2613,7 @@ class Superset(BaseSupersetView):
             # TODO(bkyryliuk): add compression=gzip for big files.
             csv = df.to_csv(index=False, **config.get('CSV_EXPORT'))
         response = Response(csv, mimetype='text/csv')
-        response.headers['Content-Disposition'] = (
-            'attachment; filename={}.csv'.format(unidecode(query.name)))
+        response.headers['Content-Disposition'] = f'attachment; filename={query.name}.csv'
         logging.info('Ready to return response')
         return response