edit-unicode-char.py

#!/usr/bin/env python3
import os
import sys
import argparse
import logging


# Edit this function to change the behavior
def transformation(content):
    content = content.decode('utf-8').replace('\u200c', '')
    return content.encode('utf-8')


def editfileinplace(filepath, nobackup):
    content = None
    with open(filepath, 'rb') as f:
        content = f.read()

    if not nobackup:
        with open(f"{filepath}.bak", 'wb') as f:
            f.write(content)

    updated_content = transformation(content)

    with open(filepath, 'wb') as f:
        f.write(updated_content)


def main():
    parser = argparse.ArgumentParser(description='Do some text/sed like operation on file, in place')
    parser.add_argument('filename', type=str, help='Path to file to work on')
    parser.add_argument('-i', action="store_true", dest="nobackup", default=False, help='Edit in place, nobackup .bak')
    args = parser.parse_args()
    if not os.path.exists(args.filename):
        logging.error(f"File not found: {args.filename}")
        sys.exit(127)
    else:
        logging.info(args.filename)
        editfileinplace(args.filename, args.nobackup)


if __name__ == "__main__":
    logging.basicConfig()
    main()

Example of usage

find . -type f -iname '*.json' -print0 |xargs -0 -P 64 -n 1 -- edit-unicode-char.py