cmd/fix: delete pre-Go 1 fixes

Assume people who were going to update to Go 1 have done so.
Those with pre-Go 1 trees remaining will need to update first
to Go 1.0 (using its 'go fix') and then to Go 1.1.

Cuts the cmd/fix test time by 99% (3 seconds to 0.03 seconds).

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7402046

1 files changed, 0 insertions, 72 deletions

diff --git a/src/cmd/fix/stringssplit.go b/src/cmd/fix/stringssplit.go
deleted file mode 100644
index d89ecf039c..0000000000
--- a/src/cmd/fix/stringssplit.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2011 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.
-
-package main
-
-import (
-	"go/ast"
-	"go/token"
-)
-
-func init() {
-	register(stringssplitFix)
-}
-
-var stringssplitFix = fix{
-	"stringssplit",
-	"2011-06-28",
-	stringssplit,
-	`Restore strings.Split to its original meaning and add strings.SplitN. Bytes too.
-
-http://codereview.appspot.com/4661051
-`,
-}
-
-func stringssplit(f *ast.File) bool {
-	if !imports(f, "bytes") && !imports(f, "strings") {
-		return false
-	}
-
-	fixed := false
-	walk(f, func(n interface{}) {
-		call, ok := n.(*ast.CallExpr)
-		// func Split(s, sep string, n int) []string
-		// func SplitAfter(s, sep string, n int) []string
-		if !ok || len(call.Args) != 3 {
-			return
-		}
-		// Is this our function?
-		switch {
-		case isPkgDot(call.Fun, "bytes", "Split"):
-		case isPkgDot(call.Fun, "bytes", "SplitAfter"):
-		case isPkgDot(call.Fun, "strings", "Split"):
-		case isPkgDot(call.Fun, "strings", "SplitAfter"):
-		default:
-			return
-		}
-
-		sel := call.Fun.(*ast.SelectorExpr)
-		args := call.Args
-		fixed = true // We're committed.
-
-		// Is the last argument -1? If so, drop the arg.
-		// (Actually we just look for a negative integer literal.)
-		// Otherwise, Split->SplitN and keep the arg.
-		final := args[2]
-		if unary, ok := final.(*ast.UnaryExpr); ok && unary.Op == token.SUB {
-			if lit, ok := unary.X.(*ast.BasicLit); ok {
-				// Is it an integer? If so, it's a negative integer and that's what we're after.
-				if lit.Kind == token.INT {
-					// drop the last arg.
-					call.Args = args[0:2]
-					return
-				}
-			}
-		}
-
-		// If not, rename and keep the argument list.
-		sel.Sel.Name += "N"
-	})
-	return fixed
-}