Georgy Guminov f9effffb6d Mostly remove pre-CXX11 workarounds. ...

С++03 support was deprecated in 1.85 and now can be removed. This PR clears
many of workarounds, which are no longer needed now.

* Remove unused workaround macros (many of).
* Remove BOOST_STATIC_ASSERT usages.
* Minimize Boost::type_traits dependency (in favour of STL's type_traits).

Closes https://github.com/boostorg/iterator/pull/82.

Squashed commit of the following:

commit 741a627b736ba81fe0054e5bf373141b04a8a597
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sat Jan 25 12:13:05 2025 +0300

    Replace testers with standard metafunctions.

commit bf4cce611454713f1c8e5f46a2c3e599c548656d
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sat Jan 25 11:51:32 2025 +0300

    Refactor is_lvalue_iterator.hpp.

commit 8d080c6c58726269cf55aedd64aa239f7d098fc7
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sat Jan 25 10:27:32 2025 +0300

    Remove more workarounds.

commit 5a4ba24d361ac0676d2cce95fdff22824ecdc287
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sun Jan 19 16:38:30 2025 +0300

    Fixes.

commit fdfafce2b9a71b1d85cbc697983652788f1c4bb7
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sat Oct 26 15:06:43 2024 +0300

    Remove BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
    Correct static_assert messages.
    Fix messages & replace is_standard_layout with is_copy_constructible.

commit c69ac1408af2fe5a105b288644367bbb6e0bc30d
Author: Georgy Guminov <gogagum@gmail.com>
Date:   Sat Oct 26 14:48:51 2024 +0300

    Correct static_assert messages.

commit b5df827151a6d752168a59fa8c20c9ffd3766c0b
Author: Georqy Guminov <gogagum@gmail.com>
Date:   Sun Jun 23 16:12:29 2024 +0300

    Fixes. Remove some Boost.MPL usages. Remove unused includes.

commit 01fd35e9f87d43f4bb46ed525a0e8eec46cba44a
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Wed Jun 12 17:14:21 2024 +0300

    abstract conjunction.

commit c02def8acf68e0829082761d26955320974e5078
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Wed Jun 12 16:35:43 2024 +0300

    return addressof & conjunction.

commit 3b3d1625752cbe8c9ec62662e594a1af1fd9a458
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Wed Jun 12 16:30:44 2024 +0300

    Make macro more readable.

commit 4ab19e045fc535dc80228062d11bb6584ccd17ff
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Wed Jun 12 15:56:49 2024 +0300

    Add static_assert messages.

commit 82b5c44cd34435d63af5cdbc7fcc1b07b39394de
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Wed Jun 12 14:12:10 2024 +0300

    Return is iterator CXX17 test.

commit 2d58d65462e837430a0990c2a414d5c397e9fa31
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Tue Jun 11 14:04:17 2024 +0300

    Omitted.

commit a0d04d9491de818df990188436e04afc3ddba3ad
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Tue Jun 11 14:00:35 2024 +0300

    Replace move with static_cast

commit 4a49b8a1a2d44d2da728dd064fe810ca86d8d1fd
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Mon Jun 10 21:38:53 2024 +0300

    Return BOOST_NOEXCEPT

commit 054c013bba75c42710537a819de91d6abfe25658
Author: Georgiy Guminov <gogagum@gmail.com>
Date:   Sun Jun 9 15:20:41 2024 +0300

    CXX11

2025-01-26 15:21:16 +03:00

..

counting_iterator_example.cpp

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filter_iterator_example.cpp

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func_output_iter_example.cpp

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indirect_iterator_example.cpp

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node_iterator1.cpp

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node_iterator1.hpp

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node_iterator2.cpp

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node_iterator2.hpp

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node_iterator3.cpp

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node_iterator3.hpp

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node.hpp

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permutation_iter_example.cpp

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reverse_iterator_example.cpp

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reverse_iterator.cpp

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shared_iterator_example1.cpp

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shared_iterator_example2.cpp

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shared_iterator_example3.cpp

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transform_iterator_example.cpp

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