Simplify interface for setting template resource limits

lib/liquid/context.rb

@@ -21,12 +21,7 @@ module Liquid
       @scopes           = [(outer_scope || {})]
       @registers        = registers
       @errors           = []
-
-      @resource_limits = if resource_limits.is_a?(ResourceLimits)
-                           resource_limits
-                         else
-                           ResourceLimits.new(resource_limits || Template.default_resource_limits)
-                         end
+      @resource_limits  = resource_limits || ResourceLimits.new(Template.default_resource_limits)
       squash_instance_assigns_with_environments
 
       @this_stack_used = false

lib/liquid/template.rb

@@ -21,10 +21,6 @@ module Liquid
     attr_accessor :root
     attr_reader :resource_limits
 
-    def resource_limits=(limits)
-      @resource_limits = ResourceLimits.new(limits)
-    end
-
     @@file_system = BlankFileSystem.new
 
     class TagRegistry
@@ -116,7 +112,7 @@ module Liquid
     end
 
     def initialize
-      self.resource_limits = self.class.default_resource_limits
+      @resource_limits = ResourceLimits.new(self.class.default_resource_limits)
     end
 
     # Parse source code.