work on branches

the concept is different in bosl, move appropriate to virtual

lib/virtual/instructions/branch.rb

@@ -1,14 +0,0 @@
-module Virtual
-
-
-  # a branch must branch to a block. This is an abstract class, names indicate the actual test
-  class Branch < Instruction
-    def initialize to
-      @to = to
-    end
-    attr_reader :to
-  end
-end
-
-require_relative "is_true_branch"
-require_relative "unconditional_branch"

lib/virtual/instructions/is_true_branch.rb

@@ -1,8 +0,0 @@
-module Virtual
-
-  # implicit means there is no explcit test involved.
-  # normal ruby rules are false and nil are false, EVERYTHING else is true (and that includes 0)
-  class IsTrueBranch < Branch
-  end
-
-end

lib/virtual/instructions/unconditional_branch.rb

@@ -1,6 +0,0 @@
-module Virtual
-
-  class UnconditionalBranch < Branch
-  end
-
-end