src/os,src/syscall: move env copy code to syscall.Environ()

src/os/env.go

@@ -8,7 +8,6 @@ package os
 
 import (
 	"internal/testlog"
-	"strings"
 	"syscall"
 )
 
@@ -138,13 +137,5 @@ func Clearenv() {
 // Environ returns a copy of strings representing the environment,
 // in the form "key=value".
 func Environ() []string {
-	orig := syscall.Environ()
-	single := strings.Join(orig, "")
-	env := make([]string, len(orig))
-	for i, v := range orig {
-		s := single[:len(v)]
-		env[i] = s
-		single = single[len(v):]
-	}
-	return env
+	return syscall.Environ()
 }