Fixes

Author: mcmorisi

source/security/auth-mechanisms/kerberos.txt

@@ -117,7 +117,6 @@ see the corresponding syntax for connecting to MongoDB with Kerberos authenticat
       :tabid: mongo-credential
 
       .. code-block:: ruby
-         :emphasize-lines: 1
 
          client = Mongo::Client.new(['<hostname>[:<port>]'],
                                     auth_mech: :gssapi,

source/security/auth-mechanisms/ldap.txt

@@ -66,7 +66,6 @@ see the corresponding syntax:
       :tabid: mongo-credential
 
       .. code-block:: ruby
-         :emphasize-lines: 1
 
          client = Mongo::Client.new([ '<hostname>' ],
                                     auth_mech: :plain,