This script removes the mysql heartbeat transactions from a mysql binlog export.

remove-transaction.sh

#! /bin/bash
total=0
while :; do
  start_line=$(cat $1 | grep -m 1 -n -B 4 'Table_map: `mysql`.`heartbeat` mapped to number 150' | grep 'BEGIN' | awk -F'-' '{print $1}')
  end_line=$(cat $1 | grep -m 1 -n -A 12 'Table_map: `mysql`.`heartbeat` mapped to number 150' | grep 'COMMIT\/\*!\*\/;' | awk -F'-' '{print $1}')
  if [[ ! -z "$start_line" ]]; then
    ((lines=end_line-start_line))
    ((total+=lines))
    echo "from $start_line to $end_line, $lines removed, total $total"
    sed -i "${start_line},${end_line}d" $1
  else
    echo "breaking $start_line"
    break 1
  fi
done
echo "done"

I've improved this one here.