runtime: remove dead code

LGTM=bradfitz, dave, ruiu
R=rsc, iant, bradfitz, dave, ruiu
CC=golang-codereviews
https://golang.org/cl/116610043

diff --git a/src/pkg/runtime/sys_linux_amd64.s b/src/pkg/runtime/sys_linux_amd64.s
index 03b9d6a7c4087fd53dd5bffb6e65e014e9dd9c7a..c402c86164f82799c5070994135763dfcf13488d 100644 (file)
--- a/src/pkg/runtime/sys_linux_amd64.s
+++ b/src/pkg/runtime/sys_linux_amd64.s
@@ -221,7 +221,6 @@ TEXT runtime·sigreturn(SB),NOSPLIT,$0
 
 TEXT runtime·mmap(SB),NOSPLIT,$0
        MOVQ    8(SP), DI
-       MOVQ    $0, SI
        MOVQ    16(SP), SI
        MOVL    24(SP), DX
        MOVL    28(SP), R10