message: build: remove AX_GCC_FUNC_ATTRIBUTE test for dllimport
  The result of this test isn't currently used anywhere (we use dllimport based on
  MSC_VER in libconsensus).
diff: @@ -815,8 +815,6 @@ if test x$ac_cv_sys_large_files != x &&
  CPPFLAGS="$CPPFLAGS -D_LARGE_FILES=$ac_cv_sys_large_files"
  fi
  -AX_GCC_FUNC_ATTRIBUTE([dllimport])
  -
  if test x$use_glibc_compat != xno; then
  AX_CHECK_LINK_FLAG([[-Wl,--wrap=__divmoddi4]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=__divmoddi4"])
  AX_CHECK_LINK_FLAG([[-Wl,--wrap=log2f]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=log2f"])
  