Do not send exceptions when they are disabled

lib/honeybadger/agent.rb

@@ -125,6 +125,11 @@ def initialize(opts = {})
     # @return [String] UUID reference to the notice within Honeybadger.
     # @return [false] when ignored.
     def notify(exception_or_opts = nil, opts = {}, **kwargs)
+      if !config[:'notices.enabled']
+        debug { 'disabled feature=notices' }
+        return false
+      end
+
       opts = opts.dup
       opts.merge!(kwargs)