Merge bitcoin/bitcoin#22952: Cleanup headers after #20788

3174425255 Cleanup headers after #20788 (Hennadii Stepanov)

Pull request description:

  This is a header cleanup after #20788.

ACKs for top commit:
  vasild:
    ACK 3174425255

Tree-SHA512: 1c21b1ba43841880625289174f10e5b333f6eb857f448e1e4114b1ecdf32a6044ec91c5987c1d66806c1d408a4e3d46569eb41d69a0acb8296601d7c203d9f1d

src/netbase.cpp

@@ -23,8 +23,6 @@
 
 #ifndef WIN32
 #include <fcntl.h>
-#else
-#include <codecvt>
 #endif
 
 #ifdef USE_POLL

src/util/sock.cpp

@@ -10,12 +10,14 @@
 #include <util/system.h>
 #include <util/time.h>
 
-#include <codecvt>
-#include <cwchar>
-#include <locale>
 #include <stdexcept>
 #include <string>
 
+#ifdef WIN32
+#include <codecvt>
+#include <locale>
+#endif
+
 #ifdef USE_POLL
 #include <poll.h>
 #endif