Remove bevy_input_focus from bevy_a11y (#18483)

# Objective

- Compiling `bevy_a11y` without default features fails because you need
to select a floating point backed. But you actually don't need it, this
requirement is from an unused linkage to `bevy_input_focus`

## Solution

- Remove link

## Testing

- CI

---------

Co-authored-by: François Mockers <mockersf@gmail.com>

crates/bevy_a11y/Cargo.toml

@@ -18,28 +18,17 @@ bevy_reflect = [
   "dep:bevy_reflect",
   "bevy_app/bevy_reflect",
   "bevy_ecs/bevy_reflect",
-  "bevy_input_focus/bevy_reflect",
 ]
 
 ## Adds serialization support through `serde`.
-serialize = [
+serialize = ["dep:serde", "bevy_ecs/serialize", "accesskit/serde"]
-  "dep:serde",
-  "bevy_ecs/serialize",
-  "bevy_input_focus/serialize",
-  "accesskit/serde",
-]
 
 # Platform Compatibility
 
 ## Allows access to the `std` crate. Enabling this feature will prevent compilation
 ## on `no_std` targets, but provides access to certain additional features on
 ## supported platforms.
-std = [
+std = ["bevy_app/std", "bevy_ecs/std", "bevy_reflect/std"]
-  "bevy_app/std",
-  "bevy_ecs/std",
-  "bevy_reflect/std",
-  "bevy_input_focus/std",
-]
 
 ## `critical-section` provides the building blocks for synchronization primitives
 ## on all platforms, including `no_std`.
@@ -47,19 +36,14 @@ critical-section = [
   "bevy_app/critical-section",
   "bevy_ecs/critical-section",
   "bevy_reflect?/critical-section",
-  "bevy_input_focus/critical-section",
 ]
 
-## Uses the `libm` maths library instead of the one provided in `std` and `core`.
-libm = ["bevy_input_focus/libm"]
-
 [dependencies]
 # bevy
 bevy_app = { path = "../bevy_app", version = "0.16.0-dev", default-features = false }
 bevy_derive = { path = "../bevy_derive", version = "0.16.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.16.0-dev", default-features = false }
 bevy_reflect = { path = "../bevy_reflect", version = "0.16.0-dev", default-features = false, optional = true }
-bevy_input_focus = { path = "../bevy_input_focus", version = "0.16.0-dev", default-features = false }
 
 # other
 accesskit = { version = "0.17", default-features = false }

crates/bevy_internal/Cargo.toml

@@ -329,7 +329,6 @@ critical-section = [
 
 # Uses the `libm` maths library instead of the one provided in `std` and `core`.
 libm = [
-  "bevy_a11y?/libm",
   "bevy_color?/libm",
   "bevy_input/libm",
   "bevy_input_focus?/libm",