[ci] Remove dulplicated code, which is to avoid docker hanging. (#14064)

Why I did it
remove duplicated code for docker hanging issue.
These codes are included in daemon step.

How I did it
remove these codes.

.azure-pipelines/azure-pipelines-build.yml

@@ -103,25 +103,6 @@ jobs:
       - template: .azure-pipelines/template-skipvstest.yml@buildimage
       - template: .azure-pipelines/template-daemon.yml@buildimage
       - bash: |
-          (
-            while true
-            do
-              sleep 120
-              now=$(date +%s)
-              pids=$(ps aux | grep -v grep | grep -E "^.{,100}docker build" | awk '{print$2}')
-              for pid in $pids
-              do
-                start=$(date --date="$(ls -dl /proc/$pid --time-style full-iso | awk '{print$6,$7}')" +%s)
-                time_s=$(($now-$start))
-                if [[ $time_s -gt $(DOCKER_BUILD_TIMEOUT) ]]; then
-                  echo =========== $(date +%F%T) $time_s &>> target/daemon.log
-                  ps $pid &>> target/daemon.log
-                  sudo kill $pid
-                fi
-              done
-            done
-          ) &
-          daemon_pid=$!
           set -ex
           if [ $(GROUP_NAME) == vs ]; then
             if [ $(dbg_image) == yes ]; then
@@ -169,6 +150,5 @@ jobs:
             fi
             make $BUILD_OPTIONS target/sonic-$(GROUP_NAME).bin
           fi
-          sudo kill $daemon_pid
         displayName: "Build sonic image"
       - template: .azure-pipelines/check-dirty-version.yml@buildimage