runtime: remove unused function declaration

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/145970043

diff --git a/src/runtime/mgc0.c b/src/runtime/mgc0.c
index 03ca288496055e7f2a7eaae08d9d808e218f02df..54728d5ada0c1a48dff7efb42e5ad4c2755ca0a8 100644 (file)
--- a/src/runtime/mgc0.c
+++ b/src/runtime/mgc0.c
@@ -1263,7 +1263,6 @@ struct gc_args
 };
 
 static void gc(struct gc_args *args);
-static void mgc(G *gp);
 
 int32
 runtime·readgogc(void)