Boost.System no longer has a library.

--- 7.0.11/qa/qa_utils/CMakeLists.txt	2023-04-15 14:35:54.000000000 +0100
+++ 7.0.11/qa/qa_utils/CMakeLists.txt	2025-08-15 06:13:42.225887737 +0100
@@ -19,7 +19,7 @@
 # or you may write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 
-find_package( Boost COMPONENTS unit_test_framework filesystem system REQUIRED )
+find_package( Boost COMPONENTS unit_test_framework filesystem REQUIRED )
 
 set( QA_UTIL_COMMON_SRC
     stdstream_line_reader.cpp