Delint RefBaseTests.cpp

This commit removes the lines from RefBaseTests.cpp that access
a moved-from object after move. This change removes "use-after-
move" clang-tidy warning.

There is no pointing testing the behavior of moved-from objects
because it can be avoided with clang-tidy check.

Bug: dawn:1439
Change-Id: If2144db2b50ad3f5a6d7a8d402b2978db4d8bd16
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/92620
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Takahiro <hogehoge@gachapin.jp>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/dawn/tests/unittests/RefBaseTests.cpp b/src/dawn/tests/unittests/RefBaseTests.cpp
index dafdcf7..6436c8a 100644
--- a/src/dawn/tests/unittests/RefBaseTests.cpp
+++ b/src/dawn/tests/unittests/RefBaseTests.cpp
@@ -244,11 +244,7 @@
     Ref& self = ref;
 
     events.clear();
-    {
-        ref = std::move(self);
-        ref = std::move(self);
-        ref = std::move(self);
-    }
+    { ref = std::move(self); }
     EXPECT_THAT(events, testing::ElementsAre());
 }