cmd/link: remove unused SFILE and FileSym

Change-Id: Iec610753052abcf6941a1cd16a9256ee9d689732
Reviewed-on: https://go-review.googlesource.com/59750
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Hiroshi Ioka <[email protected]>
Reviewed-by: Joe Tsai <[email protected]>

Author: ianlancetaylor

src/cmd/link/internal/ld/lib.go

@@ -1929,7 +1929,6 @@ const (
 	BSSSym                  = 'B'
 	UndefinedSym            = 'U'
 	TLSSym                  = 't'
-	FileSym                 = 'f'
 	FrameSym                = 'm'
 	ParamSym                = 'p'
 	AutoSym                 = 'a'
@@ -2014,9 +2013,6 @@ func genasmsym(ctxt *Link, put func(*Link, *Symbol, string, SymbolType, int64, *
 			}
 			put(ctxt, s, s.Name, BSSSym, Symaddr(s), s.Gotype)
 
-		case SFILE:
-			put(ctxt, nil, s.Name, FileSym, s.Value, nil)
-
 		case SHOSTOBJ:
 			if Headtype == objabi.Hwindows || Iself {
 				put(ctxt, s, s.Name, UndefinedSym, s.Value, nil)

src/cmd/link/internal/ld/symkind.go

@@ -97,7 +97,6 @@ const (
 	SMACHOSYMTAB
 	SMACHOINDIRECTPLT
 	SMACHOINDIRECTGOT
-	SFILE
 	SFILEPATH
 	SCONST
 	SDYNIMPORT

src/cmd/link/internal/ld/symkind_string.go

@@ -223,7 +223,7 @@ func putplan9sym(ctxt *Link, x *Symbol, s string, typ SymbolType, addr int64, go
 		}
 		fallthrough
 
-	case AutoSym, ParamSym, FileSym, FrameSym:
+	case AutoSym, ParamSym, FrameSym:
 		l := 4
 		if Headtype == objabi.Hplan9 && SysArch.Family == sys.AMD64 && !Flag8 {
 			Lputb(uint32(addr >> 32))
@@ -234,11 +234,6 @@ func putplan9sym(ctxt *Link, x *Symbol, s string, typ SymbolType, addr int64, go
 		Cput(uint8(t + 0x80)) /* 0x80 is variable length */
 
 		var i int
-
-		/* skip the '<' in filenames */
-		if t == FileSym {
-			s = s[1:]
-		}
 		for i = 0; i < len(s); i++ {
 			Cput(s[i])
 		}