It’s unusual for gas usage within Lots to be paid for by the Owners Corporation (O/C) but notwithstanding that, as the bayonet fitting was installed by previous owners and the O/C did nothing to correct that situation then or since then you, as a subsequent owner cannot be forced to remove it, although the O/C may itself do so at its expense (i.e. using the funds contributed by all owners, incl. you).