Remove mojo::edk::Init() from ARC unittest.

chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc

Index: chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc
diff --git a/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc b/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc
index 41a8862b813b832b7c0053c15e37810981cf9040..2ba11180120e0cf3dece724cdd938029dc8237c3 100644
--- a/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc
+++ b/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc
@@ -135,8 +135,6 @@ class ArcContentFileSystemFileStreamReaderTest : public testing::Test {
   ~ArcContentFileSystemFileStreamReaderTest() override = default;
 
   void SetUp() override {
-    mojo::edk::Init();
-
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
 
     base::FilePath path = temp_dir_.GetPath().AppendASCII("bar");