diff --git a/userspace/engine/lua/modules/compiler.lua b/userspace/engine/lua/modules/compiler.lua
index b5a11904..52d22a1e 100644
--- a/userspace/engine/lua/modules/compiler.lua
+++ b/userspace/engine/lua/modules/compiler.lua
@@ -113,31 +113,6 @@ function expand_macros(ast, defs, changed)
    return true, changed
 end
 
-function get_macros(ast, set)
-   if (ast.type == "Macro") then
-      set[ast.value] = true
-      return set
-   end
-
-   if ast.type == "Filter" then
-      return get_macros(ast.value, set)
-   end
-
-   if ast.type == "BinaryBoolOp" then
-      local left = get_macros(ast.left, {})
-      local right = get_macros(ast.right, {})
-
-      for m, _ in pairs(left) do set[m] = true end
-      for m, _ in pairs(right) do set[m] = true end
-
-      return set
-   end
-   if ast.type == "UnaryBoolOp" then
-      return get_macros(ast.argument, set)
-   end
-   return set
-end
-
 function get_filters(ast)
 
    local filters = {}
diff --git a/userspace/engine/lua/rule_loader.lua b/userspace/engine/lua/rule_loader.lua
index 4ec61b40..c6902f38 100644
--- a/userspace/engine/lua/rule_loader.lua
+++ b/userspace/engine/lua/rule_loader.lua
@@ -157,17 +157,6 @@ local function create_filter_obj(node, lua_parser, parent_bool_op)
    return nil
 end
 
-function set_output(output_format, state)
-
-   if(output_ast.type == "OutputFormat") then
-
-      local format
-
-   else
-      error ("Unexpected type in set_output: ".. output_ast.type)
-   end
-end
-
 -- This should be keep in sync with parser.lua
 defined_comp_operators = {
    ["="]=1,
@@ -197,7 +186,7 @@ defined_list_comp_operators = {
 -- object. The by_name index is used for things like describing rules,
 -- and the by_idx index is used to map the relational node index back
 -- to a rule.
-local state = {macros={}, lists={}, filter_ast=nil, rules_by_name={},
+local state = {macros={}, lists={}, rules_by_name={},
 	       skipped_rules_by_name={}, macros_by_name={}, lists_by_name={},
 	       n_rules=0, rules_by_idx={}, ordered_rule_names={}, ordered_macro_names={}, ordered_list_names={}}
 
@@ -1067,14 +1056,6 @@ function load_rules(rules_content,
 	    end
 	 end
 
-	 -- Rule ASTs are merged together into one big AST, with "OR" between each
-	 -- rule.
-	 if (state.filter_ast == nil) then
-	    state.filter_ast = filter_ast.filter.value
-	 else
-	    state.filter_ast = { type = "BinaryBoolOp", operator = "or", left = state.filter_ast, right = filter_ast.filter.value }
-	 end
-
 	 -- Enable/disable the rule
 	 if (v['enabled'] == nil) then
 	    v['enabled'] = true