There's a ton if you think of it as a byte array, rather than just a string. For example, network proxies that may remove various protocol TLV options from a packet.
Is that an example of “remove all occurrences of a specific byte value from an array”? Wouldn’t packet processing require some sort of structural parsing?
Packets are usually parsed by casting a uint8_t * to a struct. Frequently, the part that needs to be removed is always at the same offset in the non-error case.