Merge pull request #3302 from eseiler/fix/ciso646

[FIX] ciso646 is deprecated

Author: eseiler

include/seqan3/core/platform.hpp

@@ -9,9 +9,7 @@
 
 #pragma once
 
-#include <cinttypes>
-#include <ciso646> // makes _LIBCPP_VERSION available
-#include <cstddef> // makes __GLIBCXX__ available
+#include <version>
 
 // macro cruft
 //!\cond
@@ -104,10 +102,6 @@
 //  C++ standard and features
 // ============================================================================
 
-#if __has_include(<version>)
-#    include <version>
-#endif
-
 // C++ standard [required]
 #ifdef __cplusplus
 #    if (__cplusplus < 202002L)