circle-docker: Prune redundant packages from install list for clarity.

tools/circleci/images/Dockerfile

@@ -30,9 +30,9 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \
   && apt-get install -y \
     xvfb \
-    locales sudo tar gzip parallel \
-    net-tools netcat unzip zip bzip2 jq \
-    python3 python3-pip \
+    parallel \
+    netcat unzip zip jq \
+    python3-pip \
   && ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime \
   && { locale-gen C.UTF-8 || true; }
 ENV LANG=C.UTF-8