deps: move requests-kerberos to webhdfs_kerberos extras instead of webhdfs

Author: skshetry

setup.cfg

@@ -78,10 +78,6 @@ install_requires =
     scmrepo==0.0.7
 
 [options.extras_require]
-# gssapi should not be included in all_remotes, because it doesn't have wheels
-# for linux and mac, so it will fail to compile if user doesn't have all the
-# requirements, including kerberos itself. Once all the wheels are available,
-# we can start shipping it by default.
 all =
     %(azure)s
     %(gdrive)s
@@ -108,11 +104,15 @@ s3 = s3fs[boto3]>=2021.11.1
 ssh =
     bcrypt
     sshfs[bcrypt]>=2021.11.2
+# gssapi should not be included in all_remotes, because it doesn't have wheels
+# for Linux, so it will fail to compile if user doesn't have all the
+# requirements, including kerberos itself.
 ssh_gssapi = sshfs[gssapi]>=2021.11.2
 webdav = webdav4>=0.9.3
 # not to break `dvc[webhdfs]`
 webhdfs =
-    requests-kerberos==0.14.0
+# requests-kerberos requires krb5 & gssapi, which does not provide wheels Linux
+webdhfs_kerberos = requests-kerberos==0.14.0
 terraform = tpi[ssh]>=2.1.0
 tests =
     %(terraform)s