Remove more apt packages [skip ci]

cpp/examples/minimal_build/Dockerfile

@@ -21,9 +21,6 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -y -q && \
     apt-get install -y -q --no-install-recommends \
-      autoconf \
       build-essential \
-      cmake \
-      g++ \
-      gcc && \
+      cmake && \
       apt-get clean && rm -rf /var/lib/apt/lists*