Fix: avoid using Marshal.dump, .load

Honeybadger.context does "Local context" on its own, now.

https://docs.honeybadger.io/lib/ruby/getting-started/adding-context-to-errors/

Before, this code had issues around marshaling/unmarshaling that it does
not need to have.

lib/barsoom_utils/exception_notifier.rb

@@ -37,14 +37,7 @@ def self.message(message, details_or_context = nil, context_or_nothing = nil)
 
     # Wrap this around code to add context when reporting errors.
     def self.run_with_context(context, &block)
-      # The load/dump achieves a "deep dup" without the "deep dep" of Active Support 🥁
-      old_context = Marshal.load(Marshal.dump(Honeybadger.get_context))
-
-      Honeybadger.context(context)
-      block.call
-    ensure
-      Honeybadger.context.clear!
-      Honeybadger.context(old_context)
+      Honeybadger.context(context, &block)
     end
   end
 end