Document that pyasn1 is required

1 files changed, 2 insertions, 16 deletions

diff --git a/paramiko/ssh_gss.py b/paramiko/ssh_gss.py
index ebf2cc80..dfc9ddc8 100644
--- a/paramiko/ssh_gss.py
+++ b/paramiko/ssh_gss.py
@@ -39,22 +39,8 @@ import sys
 """
 GSS_AUTH_AVAILABLE = True
 
-try:
-    from pyasn1.type.univ import ObjectIdentifier
-    from pyasn1.codec.der import encoder, decoder
-except ImportError:
-    GSS_AUTH_AVAILABLE = False
-    class ObjectIdentifier(object):
-        def __init__(self, *args):
-            raise NotImplementedError("Module pyasn1 not importable")
-
-    class decoder(object):
-        def decode(self):
-            raise NotImplementedError("Module pyasn1 not importable")
-
-    class encoder(object):
-        def encode(self):
-            raise NotImplementedError("Module pyasn1 not importable")
+from pyasn1.type.univ import ObjectIdentifier
+from pyasn1.codec.der import encoder, decoder
 
 from paramiko.common import MSG_USERAUTH_REQUEST
 from paramiko.ssh_exception import SSHException