removing exceptions

lib/ast/if_expression.rb

@@ -1,7 +1,8 @@
 module Ast
   class IfExpression < Expression
 #    attr_reader  :cond, :if_true, :if_false
-    def compile context
+    def compile frame , method
+      return nil
       f = context.function
       # to execute the logic as the if states it, the blocks are the other way around
       # so we can the jump over the else if true ,and the else joins unconditionally after the true_block