Flow Graph - remove C++03 legacy #4714

Job	Run time
examples_clang-format	17s
codespell	38s
python_module_test_ubuntu_latest	44s
copyright_check	14s
ubuntu-24.04-arm_g++-14_cxx20_debug_preview=ON	13m 53s
ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	20m 54s
windows_cl2022_cxx14_relwithdebinfo_preview=ON	17m 35s
doc_examples_windows-2022_cl_cxx20_relwithdebinfo	1m 46s
ubuntu-24.04-arm_clang++_cxx20_release_preview=ON	16m 8s
ubuntu-22.04-arm_g++_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	18m 0s
ubuntu-22.04_g++_cxx17_release_preview=ON	16m 42s
examples_ubuntu-22.04_g++_cxx17_release_preview=ON	3m 51s
windows_cl2022_cxx17_relwithdebinfo_preview=OFF	16m 38s
macos-13_clang++_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	27m 27s
examples_ubuntu-24.04_g++_cxx20_debug_preview=ON	4m 58s
macos-15_clang++_cxx17_debug_preview=ON	9m 16s
examples_ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	4m 8s
examples_windows_11_arm_cl2022_cxx14_relwithdebinfo_preview=ON	6m 54s
windows_11_arm_cl2022_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	18m 47s
macos-14_clang++_cxx14_relwithdebinfo_preview=ON	9m 49s
doc_examples_ubuntu-latest_g++_cxx20_relwithdebinfo	54s
examples_windows_cl2022_cxx17_relwithdebinfo_preview=OFF	5m 53s
examples_macos-15_clang++_cxx14_relwithdebinfo_preview=ON	3m 5s
documentation	0s
pages	0s
	3h 38m 31s

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