runtime/internal/sys: remove Intptr

Apparently its last use was removed in CL 8899.

Change-Id: I4f3a789b3cc4c249582e81463af62b576a281e40
Reviewed-on: https://go-review.googlesource.com/16880
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/runtime/internal/sys/arch_386.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint32
-type Intptr int32 // TODO(rsc): remove

src/runtime/internal/sys/arch_amd64.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove

src/runtime/internal/sys/arch_amd64p32.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int32 // TODO(rsc): remove

src/runtime/internal/sys/arch_arm.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint32
-type Intptr int32 // TODO(rsc): remove

src/runtime/internal/sys/arch_arm64.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove

src/runtime/internal/sys/arch_mips64.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove

src/runtime/internal/sys/arch_mips64le.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove

src/runtime/internal/sys/arch_ppc64.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove

src/runtime/internal/sys/arch_ppc64le.go

@@ -16,4 +16,3 @@ const (
 )
 
 type Uintreg uint64
-type Intptr int64 // TODO(rsc): remove