Heavy lasers are Clan Tech. Clanners don't do a whole lot of melee. So the answer is presumably "no".
Plus, since we're talking Clan tech, the Clanners also have access to the ol' fashioned ER Small Laser. Compared to the Heavy Small, the ER Small loses out on raw damage, "only" 5 points compared to 6... but since the ER Small is also longer ranged and more accurate at all ranges, it'll usually end up doing more damage anyways. Yes, even at point-blank range.
Compared to the other Heavies (medium and large), at melee range, the ER Small matches the damage-per-ton of the Medium Heavy and exceeds that of the Large Heavy, and runs far cooler than either of them. If melee range effectiveness is all that you're looking for, the larger Heavies don't hold up. (And no serious person uses them for long range, either)
That and the costs of them, you're really only using Heavy Lasers if you're gaming the BV system. Even then, your mileage may vary; BT's weapon BV calculation tends to over-value less accurate weapons such as the Heavy Laser and MRM.