core: fully revert stuff from ssh_info memoization

5036d16461cfafde5274836d51b97740c23bd4eb only partially reverted
89a4a29d65cace4d970d0f220ad01815883ab8aa.

Related to #4670.

lib/vagrant/machine.rb

@@ -72,12 +72,6 @@ module Vagrant
     # @return [Vagrantfile]
     attr_reader :vagrantfile
 
-    # The SSH information for accessing this machine.
-    # This attribute is set only when the machine is ready for SSH communication.
-    #
-    # @return [Hash]
-    attr_reader :ssh_info
-
     # Initialize a new machine.
     #
     # @param [String] name Name of the virtual machine.
@@ -470,6 +464,7 @@ module Vagrant
         end
       end
 
+      # Return the final compiled SSH info data
       info
     end