cmd/cover: fix build

TBR=rsc

Change-Id: I6ec69013027213c5e7adedd2edb89dea6af876d9
Reviewed-on: https://go-review.googlesource.com/9563Reviewed-by: Rob Pike <r@golang.org>

src/cmd/cover/doc.go

@@ -18,4 +18,4 @@ For usage information, please see:
 	go help testflag
 	go tool cover -help
 */
-package main // import "golang.org/x/tools/cmd/cover"
+package main

src/cmd/cover/func.go

@@ -16,8 +16,6 @@ import (
 	"os"
 	"path/filepath"
 	"text/tabwriter"
-
-	"golang.org/x/tools/cover"
 )
 
 // funcOutput takes two file names as arguments, a coverage profile to read as input and an output

src/cmd/cover/html.go

@@ -16,8 +16,6 @@ import (
 	"os/exec"
 	"path/filepath"
 	"runtime"
-
-	"golang.org/x/tools/cover"
 )
 
 // htmlOutput reads the profile data from profile and generates an HTML