remove azure

support is currently unofficial as of 1.5.0

Author: JMBurley

setup.cfg

@@ -71,8 +71,6 @@ s3 =
 gcp =
  gcsfs>=2021.05.0
  pandas-gbq>=0.15.0
-azure =
- adlfs >=0.6.0
 excel =
  openpyxl>=3.0.7
  pyxlsb>=1.0.8