godoc: remove some unused code

Run goimports while at it.

Change-Id: Ia3fea40835deb88bba0bb72c605bf02a6e407c88
Reviewed-on: https://go-review.googlesource.com/34953
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

godoc/dirtrees.go

@@ -7,7 +7,6 @@
 package godoc
 
 import (
-	"bytes"
 	"go/doc"
 	"go/parser"
 	"go/token"
@@ -205,20 +204,6 @@ func (c *Corpus) newDirectory(root string, maxDepth int) *Directory {
 	return b.newDirTree(token.NewFileSet(), root, d.Name(), 0)
 }
 
-func (dir *Directory) writeLeafs(buf *bytes.Buffer) {
-	if dir != nil {
-		if len(dir.Dirs) == 0 {
-			buf.WriteString(dir.Path)
-			buf.WriteByte('\n')
-			return
-		}
-
-		for _, d := range dir.Dirs {
-			d.writeLeafs(buf)
-		}
-	}
-}
-
 func (dir *Directory) walk(c chan<- *Directory, skipRoot bool) {
 	if dir != nil {
 		if !skipRoot {

godoc/index.go

@@ -1429,15 +1429,6 @@ func (c *Corpus) invalidateIndex() {
 	c.refreshMetadata()
 }
 
-// indexUpToDate() returns true if the search index is not older
-// than any of the file systems under godoc's observation.
-//
-func (c *Corpus) indexUpToDate() bool {
-	_, fsTime := c.fsModified.Get()
-	_, siTime := c.searchIndex.Get()
-	return !fsTime.After(siTime)
-}
-
 // feedDirnames feeds the directory names of all directories
 // under the file system given by root to channel c.
 //

godoc/vfs/emptyvfs_test.go

@@ -5,10 +5,11 @@
 package vfs_test
 
 import (
-	"golang.org/x/tools/godoc/vfs"
-	"golang.org/x/tools/godoc/vfs/mapfs"
 	"testing"
 	"time"
+
+	"golang.org/x/tools/godoc/vfs"
+	"golang.org/x/tools/godoc/vfs/mapfs"
 )
 
 func TestNewNameSpace(t *testing.T) {