Remove the optional generic-array feature

- It can be added back later if needed
- A public dependency implies version coupling, and we can't afford to
  have it for a niche use case.

Cargo.toml

@@ -19,12 +19,7 @@ version = "0.1.8"
 path = "nodrop"
 default-features = false
 
-[dependencies.generic-array]
-version = "0.5.1"
-optional = true
-
 [features]
 default = ["std"]
 std = ["odds/std", "nodrop/std"]
 use_union = ["nodrop/use_union"]
-use_generic_array = ["generic-array"]