Fix iwyu and CHANGELOG

Author: mathieurobin1

CHANGELOG.md

@@ -23,9 +23,9 @@ Increment the:
 
 * [SDK] Update default exemplar reservoir size for exponential histograms
   [#3551](https://github.com/open-telemetry/opentelemetry-cpp/pull/3551)
-  
+
 * [SDK] Implements options for the ParentBasedSampler with default values
-  [#3549](https://github.com/open-telemetry/opentelemetry-cpp/pull/3553)
+  [#3553](https://github.com/open-telemetry/opentelemetry-cpp/pull/3553)
 
 ## [1.22 2025-07-11]
 

sdk/src/trace/samplers/parent.cc

@@ -1,7 +1,6 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-#include <map>
 #include <memory>
 #include <string>