nearest_neighbor_graph_ann: remove forcing of C linkage

The only calls into this function are from C++ code now, so there is no need to
require C calling conventions.

Gitlab: #2154

diff --git a/lib/mingle/nearest_neighbor_graph_ann.h b/lib/mingle/nearest_neighbor_graph_ann.h
index d02affcd9c5b8f56e37a7991c95097c1b7f475e9..77660d9add33001d0c60198eb184ac810c8d3666 100644 (file)
--- a/lib/mingle/nearest_neighbor_graph_ann.h
+++ b/lib/mingle/nearest_neighbor_graph_ann.h
@@ -10,12 +10,4 @@
 
 #pragma once
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 void nearest_neighbor_graph_ann(int nPts, int k, double eps, double *x, int *nz0, int *irn0, int *jcn0, double *val0);
-
-#ifdef __cplusplus
-}
-#endif