Remove thread backtrace log.

ioquatix · ioquatix · commit e9f893094154 · 2026-04-05T20:44:33.000+12:00
diff --git a/test/async/promise.rb b/test/async/promise.rb
@@ -854,9 +854,6 @@
 			thread.join
 			
 			expect(result).to be == :success
-			Fiber.blocking do
-				pp backtrace: thread.backtrace
-			end
 		end
 	end
 end
