internal/socket: remove unused sizeofMmsghdr const

Change-Id: I6f66e2fd93916438ad959de469ee081b7085fe1a
Reviewed-on: https://go-review.googlesource.com/c/net/+/195597
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

internal/socket/defs_aix.go

@@ -31,7 +31,6 @@ type sockaddrInet6 C.struct_sockaddr_in6
 const (
 	sizeofIovec   = C.sizeof_struct_iovec
 	sizeofMsghdr  = C.sizeof_struct_msghdr
-	sizeofMmsghdr = C.sizeof_struct_mmsghdr
 	sizeofCmsghdr = C.sizeof_struct_cmsghdr
 
 	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in

internal/socket/defs_linux.go

@@ -33,7 +33,6 @@ type sockaddrInet6 C.struct_sockaddr_in6
 const (
 	sizeofIovec   = C.sizeof_struct_iovec
 	sizeofMsghdr  = C.sizeof_struct_msghdr
-	sizeofMmsghdr = C.sizeof_struct_mmsghdr
 	sizeofCmsghdr = C.sizeof_struct_cmsghdr
 
 	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in

internal/socket/defs_netbsd.go

@@ -31,7 +31,6 @@ type sockaddrInet6 C.struct_sockaddr_in6
 const (
 	sizeofIovec   = C.sizeof_struct_iovec
 	sizeofMsghdr  = C.sizeof_struct_msghdr
-	sizeofMmsghdr = C.sizeof_struct_mmsghdr
 	sizeofCmsghdr = C.sizeof_struct_cmsghdr
 
 	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in

internal/socket/zsys_aix_ppc64.go

@@ -53,7 +53,6 @@ type sockaddrInet6 struct {
 const (
 	sizeofIovec   = 0x10
 	sizeofMsghdr  = 0x30
-	sizeofMmsghdr = 0x38
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_386.go

@@ -47,7 +47,6 @@ type sockaddrInet6 struct {
 const (
 	sizeofIovec   = 0x8
 	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_amd64.go

@@ -50,7 +50,6 @@ type sockaddrInet6 struct {
 const (
 	sizeofIovec   = 0x10
 	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_arm.go

@@ -45,9 +45,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x8
-	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
+	sizeofIovec  = 0x8
+	sizeofMsghdr = 0x1c
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_arm64.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_mips.go

@@ -45,9 +45,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x8
-	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
+	sizeofIovec  = 0x8
+	sizeofMsghdr = 0x1c
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_mips64.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_mips64le.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_mipsle.go

@@ -45,9 +45,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x8
-	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
+	sizeofIovec  = 0x8
+	sizeofMsghdr = 0x1c
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_ppc64.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_ppc64le.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_riscv64.go

@@ -49,9 +49,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_linux_s390x.go

@@ -48,9 +48,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x38
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x38
+
 	sizeofCmsghdr = 0x10
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_netbsd_386.go

@@ -47,9 +47,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x8
-	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
+	sizeofIovec  = 0x8
+	sizeofMsghdr = 0x1c
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_netbsd_amd64.go

@@ -50,9 +50,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x10
-	sizeofMsghdr  = 0x30
-	sizeofMmsghdr = 0x40
+	sizeofIovec  = 0x10
+	sizeofMsghdr = 0x30
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_netbsd_arm.go

@@ -47,9 +47,9 @@ type sockaddrInet6 struct {
 }
 
 const (
-	sizeofIovec   = 0x8
-	sizeofMsghdr  = 0x1c
-	sizeofMmsghdr = 0x20
+	sizeofIovec  = 0x8
+	sizeofMsghdr = 0x1c
+
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10

internal/socket/zsys_netbsd_arm64.go

@@ -52,7 +52,6 @@ type sockaddrInet6 struct {
 const (
 	sizeofIovec   = 0x10
 	sizeofMsghdr  = 0x30
-	sizeofMmsghdr = 0x40
 	sizeofCmsghdr = 0xc
 
 	sizeofSockaddrInet  = 0x10