Also if you remove the pipes, and just leave the meter-intlet valve shut, you’ve just left what’s known as an ‘open end’ – in effect if the gas were turned back on at the valve it’d still be live. That’d be a RIDDOR reportable offence and the HSE should be informed.
Get a qualified Gase Safe engineer to cap off the meter. Or if you’re removing the meter the transporter (your supplier) will come and remove the meter.
You should then be safe to remove the pipes, make sure you take them to your local ‘recycling centre’ too 😆
Edit; dont take chances with gas, it’s really not worth it!