unset proxy for block file in bos (#28119)

tools/check_file_diff_approvals.sh

@@ -304,8 +304,8 @@ fi
 # Get the list of PR authors with unresolved unit test issues
 pip install PyGithub
 # For getting PR related data
-wget https://sys-p0.bj.bcebos.com/blk/block.txt --no-check-certificate
-wget https://sys-p0.bj.bcebos.com/bk-ci/bk.txt --no-check-certificate
+wget https://sys-p0.bj.bcebos.com/blk/block.txt --no-check-certificate --no-proxy
+wget https://sys-p0.bj.bcebos.com/bk-ci/bk.txt --no-check-certificate --no-proxy
 HASUTFIXED=`python ${PADDLE_ROOT}/tools/check_ut.py | grep "has unit-test to be fixed" || true`
 if [ "${HASUTFIXED}" != "" ]; then
   echo_line="${HASUTFIXED} You must have one RD (chalsliu (Recommend) or kolinwei) approval.\n"