Remove duplicated COPY-command in gerrit-init Dockerfile

Change-Id: I3c7ae7fd4e009a2906e0ae8f7699cf920cf24214
diff --git a/container-images/gerrit-init/Dockerfile b/container-images/gerrit-init/Dockerfile
index 9049214..1cfa326 100644
--- a/container-images/gerrit-init/Dockerfile
+++ b/container-images/gerrit-init/Dockerfile
@@ -16,8 +16,6 @@
 COPY tools/* /var/tools/
 COPY config/* /var/config/
 
-COPY tools/* /var/tools/
-
 USER gerrit
 
 ENTRYPOINT ["/var/tools/gerrit_init.py", "-s", "/var/gerrit"]