Revert "ovn-central: check raft inconsistency from nb/sb logs (#3532)"

This reverts commit 2c7acdb.

dist/images/ovn-healthcheck.sh

@@ -30,19 +30,3 @@ if echo ${sb_status} | grep "disconnected" && echo ${sb_role} | grep "candidate"
     echo "sb health check failed"
     exit 1
 fi
-
-set +o pipefail
-
-# check nb/sb log file
-function check_log_file() {
-    local log_file="/var/log/ovn/ovsdb-server-$1.log"
-    if [ -e $log_file ]; then
-        if grep -wE '(opened log file)|(does not match prerequisite)' $log_file 2>/dev/null | tail -n 1 | grep 'does not match prerequisite' ; then
-            echo "raft inconsistency in $1 db was detected, please check $log_file for more details."
-            return 1
-        fi
-    fi
-}
-
-check_log_file nb
-check_log_file sb