remove apt key from python Dockerfile

Change-Id: I731c17b5219dae79d2711d76bf3f2fb29909065d

python/Dockerfile

@@ -22,9 +22,7 @@ ENV TZ Asia/Shanghai
 
 COPY sources.list /etc/apt/sources.list
 COPY requirements.txt ./
-RUN apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 40976EAF437D05B5 \
-    && apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 3B4FE6ACC0B21F32 \
-    && apt-get update \
+RUN apt-get update \
     && apt-get install bzip2 gcc libmysqlclient-dev -y \
     && rm -rf /var/lib/apt/lists/* \
     && pip install --no-cache-dir --trusted-host mirrors.aliyun.com \