remove unused reference

lib/register/reference.rb

@@ -1,30 +0,0 @@
-module Register
-  class Reference < Word
-    # needs to be here as Word's constructor is private (to make it abstract)
-    def initialize reg , clazz = nil
-      super(reg)
-      @clazz = clazz
-    end
-    attr_accessor :clazz
-
-    def load block , right
-      if(right.is_a? IntegerConstant)
-        block.mov(  self ,  right )  #move the value
-      elsif right.is_a? StringConstant
-        block.add( self , right , nil)   #move the address, by "adding" to pc, ie pc relative
-        block.mov( Integer.new(self.register.next_reg_use) ,  right.word_length )  #and the length HACK TODO
-      elsif right.is_a?(Boot::BootClass) or right.is_a?(Boot::MetaClass)
-        block.add( self , right , nil)   #move the address, by "adding" to pc, ie pc relative
-      else
-        raise "unknown #{right.inspect}" 
-      end
-      self
-    end
-
-    def at_index block , left , right
-      block.ldr( self , left , right )
-      self
-    end
-
-  end
-end