import re


def remove_escape_chars(s, chars):
    """Removes escapes from any escaped occurances of the given characters in
    the given string.

    Args:
        s: a string
        chars: the iterable (e.g., string or list) of characters to unescape

    Returns:
        the unescaped string
    """
    return re.sub(r"\\([%s])" % "".join(chars), r"\1", s)