Revert "wifi: mt76: mt7996: advertize beacon_int_min_gcd"

This reverts commit 7fee7b2.

patch causes warning in mainline (6.11-rc5) code

WARNING: CPU: 3 PID: 2949 at net/wireless/core.c:671 wiphy_register+0x3b4/0x8d8 [cfg80211]

	if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
		    c->beacon_int_min_gcd)) {
		return -EINVAL;
	}

Author: frank-w

drivers/net/wireless/mediatek/mt76/mt7996/init.c

@@ -42,7 +42,6 @@ static const struct ieee80211_iface_combination if_comb[] = {
 				       BIT(NL80211_CHAN_WIDTH_40) |
 				       BIT(NL80211_CHAN_WIDTH_80) |
 				       BIT(NL80211_CHAN_WIDTH_160),
-		.beacon_int_min_gcd = 100,
 	}
 };