remove instance_get instruction

lib/virtual/instructions/instance_get.rb

@@ -1,13 +0,0 @@
-module Virtual
-
-  # Get a instance variable by _name_ . So we have to resolve the name to an index to
-  # transform into a Slot
-  # The slot may the be used in a set on left or right hand.
-  # The transformation is done by GetImplementation
-  class InstanceGet < Instruction
-    def initialize name
-      @name = name.to_sym
-    end
-    attr_reader :name
-  end
-end