Remove unused static import of Assert.fail

The code is now referring to the inherited fail method, so this import
is now unused. Unfortunately, google-java-format can't detect this case.

Change-Id: I0af350c5a9beb709ac4c7051a8687b355a380432
diff --git a/src/test/java/com/googlesource/gerrit/plugins/supermanifest/JiriSuperManifestIT.java b/src/test/java/com/googlesource/gerrit/plugins/supermanifest/JiriSuperManifestIT.java
index 5852a25..a8b3427 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/supermanifest/JiriSuperManifestIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/supermanifest/JiriSuperManifestIT.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.junit.Assert.fail;
 
 import com.google.gerrit.acceptance.GitUtil;
 import com.google.gerrit.acceptance.LightweightPluginDaemonTest;