At this point, the decision to add Bluetooth or not is literally just a product decision. If you don't want Bluetooth in your product, you actively have to disable the Bluetooth part of your WiFi chip, because you can't really get a WiFi chip without Bluetooth.
All of the BT+wifi chips I’ve worked with require active initialization of each feature; you have to signal the chip (over i2c or SPI or whatever) with what kind of BT operations you want.
No BT stack in your product, no BT radio initialization, no BT/wifi multiplexing. At least in the (admittedly limited) chips I’ve worked with.