Don't disable wxUSE_CRASHREPORT in Win64 builds

Creating minidumps works in 64 bit builds since quite some time (see
603c73dbba), so there is no reason to forcefully
disable it any more.

Closes #17162.

include/wx/msw/chkconf.h

@@ -180,17 +180,6 @@
 #   endif
 #endif
 
-/*
-   Win64-specific checks.
- */
-#ifdef __WIN64__
-#   if wxUSE_STACKWALKER
-#       undef wxUSE_CRASHREPORT
-#       define wxUSE_CRASHREPORT 0
-#   endif
-#endif /* __WIN64__ */
-
-
 /*
    Compiler-specific checks.
  */