pathplan: [nfc] remove useless default extern declaration of functions in pathutil.h

diff --git a/lib/pathplan/pathutil.h b/lib/pathplan/pathutil.h
index 0a263cedf41370d568d52841a10af2643e2658a8..99b8ba327756c05e8664bfb9c8579180f59fcb61 100644 (file)
--- a/lib/pathplan/pathutil.h
+++ b/lib/pathplan/pathutil.h
@@ -33,7 +33,7 @@ extern "C" {
 #endif
 
 #ifndef PATHUTIL_API
-#define PATHUTIL_API extern
+#define PATHUTIL_API /* nothing */
 #endif
        typedef double COORD;
     PATHUTIL_API COORD area2(Ppoint_t, Ppoint_t, Ppoint_t);