Revert "handles exceptions with #to_hash properly"

This reverts commit 1b65dd7.

This commit is being reverted because the :exception key on the argument
to Notice.new is no longer an Exception decendant. As part of this
change, Notice needs to be reworked to handle that, or preferably never
instanciate a notice where the :exception key on the args is not an
Exception object.

Conflicts:

	test/notifier_test.rb

lib/airbrake.rb

@@ -132,8 +132,11 @@ def send_notice(notice)
 
     def build_notice_for(exception, opts = {})
       exception = unwrap_exception(exception)
-      opts = opts.merge(:exception => exception)
-      opts = opts.merge(exception.to_hash) if exception.respond_to?(:to_hash)
+      if exception.respond_to?(:to_hash)
+        opts = opts.merge(exception.to_hash)
+      else
+        opts = opts.merge(:exception => exception)
+      end
       Notice.new(configuration.merge(opts))
     end
 

test/notifier_test.rb

@@ -82,19 +82,6 @@ def set_development_env
     assert_sent(notice, notice_args)
   end
 
-  should "create and send a notice for an exception that responds to to_hash" do
-    set_public_env
-    exception = build_exception
-    notice = stub_notice!
-    notice_args = { :error_message => 'uh oh' }
-    exception.stubs(:to_hash).returns(notice_args)
-    stub_sender!
-
-    Airbrake.notify(exception)
-
-    assert_sent(notice, notice_args.merge(:exception => exception))
-  end
-
   should "create and sent a notice for an exception and hash" do
     set_public_env
     exception = build_exception