Remove is_ignored_exception, just let Appsignal library figure that out

lib/roqua/support/errors.rb

@@ -69,7 +69,7 @@ module Roqua
         end
 
         def notify_appsignal?(exception)
-          const_defined?(:Appsignal) && Appsignal.active? && !Appsignal.is_ignored_exception?(exception)
+          const_defined?(:Appsignal) && Appsignal.active?
         end
 
         def notify_appsignal(exception, labels, namespace)

spec/roqua/support/errors_spec.rb

@@ -96,7 +96,6 @@ describe 'Error reporting' do
     before do
       Appsignal.config = Appsignal::Config.new(Dir.pwd, "test")
       allow(Appsignal).to receive(:active?).and_return(true)
-      allow(Appsignal).to receive(:is_ignored_exception?).and_return(false)
       allow(Appsignal).to receive(:agent).and_return(agent)
     end