Remove unused import

Change-Id: I2e3eca7272b87f58d0ff8d45bc2a250c2444653f
(cherry picked from commit 7e1b80542fe953d9b06209e549c778171df37cae)
diff --git a/gerrit-httpd/src/test/java/com/google/gerrit/httpd/raw/ResourceServletTest.java b/gerrit-httpd/src/test/java/com/google/gerrit/httpd/raw/ResourceServletTest.java
index 2ddd4eef..3eb3088 100644
--- a/gerrit-httpd/src/test/java/com/google/gerrit/httpd/raw/ResourceServletTest.java
+++ b/gerrit-httpd/src/test/java/com/google/gerrit/httpd/raw/ResourceServletTest.java
@@ -36,7 +36,6 @@
 import org.junit.Test;
 
 import java.io.ByteArrayInputStream;
-import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.FileSystem;
 import java.nio.file.Files;