runtime: remove type.go

We have an autogenerated version in zruntime_defs.
I am not sure what are the consequences as gdb never printed any values for me.
But it looks unnecessary to manually duplicate it.

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews, iant, khr
https://golang.org/cl/115660043

src/cmd/ld/dwarf.c

@@ -2049,8 +2049,8 @@ dwarfemitdebugsections(void)
 	newattr(die, DW_AT_go_kind, DW_CLS_CONSTANT, KindUintptr, 0);
 
 	// Needed by the prettyprinter code for interface inspection.
-	defgotype(lookup_or_diag("type.runtime.rtype"));
-	defgotype(lookup_or_diag("type.runtime.interfaceType"));
+	defgotype(lookup_or_diag("type.runtime._type"));
+	defgotype(lookup_or_diag("type.runtime.interfacetype"));
 	defgotype(lookup_or_diag("type.runtime.itab"));
 
 	genasmsym(defdwsymb);

src/pkg/runtime/type.go

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-/*
- * Runtime type representation.
- * This file exists only to provide types that 6l can turn into
- * DWARF information for use by gdb.  Nothing else uses these.
- * They should match the same types in ../reflect/type.go.
- * For comments see ../reflect/type.go.
- */
-
-package runtime
-
-import "unsafe"
-
-type rtype struct {
-	size       uintptr
-	hash       uint32
-	_          uint8
-	align      uint8
-	fieldAlign uint8
-	kind       uint8
-	alg        unsafe.Pointer
-	gc         [2]unsafe.Pointer
-	string     *string
-	*uncommonType
-	ptrToThis *rtype
-	zero      unsafe.Pointer
-}
-
-type _method struct {
-	name    *string
-	pkgPath *string
-	mtyp    *rtype
-	typ     *rtype
-	ifn     unsafe.Pointer
-	tfn     unsafe.Pointer
-}
-
-type uncommonType struct {
-	name    *string
-	pkgPath *string
-	methods []_method
-}
-
-type _imethod struct {
-	name    *string
-	pkgPath *string
-	typ     *rtype
-}
-
-type interfaceType struct {
-	rtype
-	methods []_imethod
-}

src/pkg/runtime/type.h

@@ -2,11 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-/*
- * Runtime type representation; master is type.go
- *
- * The Type*s here correspond 1-1 to type.go's *rtype.
- */
+// Runtime type representation.
 
 typedef struct Type Type;
 typedef struct UncommonType UncommonType;
@@ -16,8 +12,7 @@ typedef struct IMethod IMethod;
 typedef struct SliceType SliceType;
 typedef struct FuncType FuncType;
 
-// Needs to be in sync with ../../cmd/ld/decodesym.c:/^commonsize,
-// pkg/reflect/type.go:/type anf type.go:/rtype
+// Needs to be in sync with ../../cmd/ld/decodesym.c:/^commonsize and pkg/reflect/type.go:/type.
 struct Type
 {
 	uintptr size;