Merge pull request #537 from mirokuratczyk/data_root_directory

Remove unused import

psiphon/memory_test/memory_test.go

@@ -25,7 +25,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path/filepath"
 	"runtime"
 	"strings"
 	"sync"