Simplify features now that portable-atomic is removed

Cargo.toml

@@ -509,9 +509,6 @@ std = ["bevy_internal/std"]
 # `critical-section` provides the building blocks for synchronization primitives on all platforms, including `no_std`.
 critical-section = ["bevy_internal/critical-section"]
 
-# `portable-atomic` provides additional platform support for atomic types and operations, even on targets without native support. 
-portable-atomic = ["bevy_internal/portable-atomic"]
-
 # Uses the `libm` maths library instead of the one provided in `std` and `core`.
 libm = ["bevy_internal/libm"]
 

crates/bevy_internal/Cargo.toml

@@ -315,23 +315,6 @@ critical-section = [
   "bevy_tasks/critical-section",
 ]
 
-# `portable-atomic` provides additional platform support for atomic types and
-# operations, even on targets without native support. 
-portable-atomic = [
-  "bevy_a11y?/portable-atomic",
-  "bevy_app/portable-atomic",
-  "bevy_diagnostic/portable-atomic",
-  "bevy_ecs/portable-atomic",
-  "bevy_input/portable-atomic",
-  "bevy_input_focus?/portable-atomic",
-  "bevy_platform_support/portable-atomic",
-  "bevy_reflect/portable-atomic",
-  "bevy_state?/portable-atomic",
-  "bevy_time/portable-atomic",
-  "bevy_utils/portable-atomic",
-  "bevy_tasks/portable-atomic",
-]
-
 # Uses the `libm` maths library instead of the one provided in `std` and `core`.
 libm = [
   "bevy_a11y?/libm",

crates/bevy_platform_support/README.md

@@ -45,12 +45,7 @@ This is explicitly incompatible with `no_std` targets.
 Enables usage of the [`alloc`](https://doc.rust-lang.org/stable/alloc/) crate. Note that this feature is automatically enabled when enabling `std`.
 This is compatible with most `no_std` targets, but not all.
 
-### `portable-atomic`
-
-Switches to using [`portable-atomic`](https://docs.rs/portable-atomic/latest/portable_atomic/) as a backend for atomic types, such as `Arc`, `AtomicU8`, etc.
-You may need to enable this feature on platforms without full support for atomic types or certain operations, such as [atomic CAS](https://en.wikipedia.org/wiki/Compare-and-swap).
-
 ### `critical-section`
 
 Switches to using [`critical-section`](https://docs.rs/critical-section/latest/critical_section/) as a backend for synchronization.
-You may need to enable this feature on platforms with little to no support for atomic operations, and is often paired with the `portable-atomic` feature.
+You may need to enable this feature on platforms with little to no support for atomic operations.

crates/bevy_tasks/README.md

@@ -36,7 +36,7 @@ The determining factor for what kind of work should go in each pool is latency r
 
 ## `no_std` Support
 
-To enable `no_std` support in this crate, you will need to disable default features, and enable the `edge_executor` and `critical-section` features. For platforms without full support for Rust atomics, you may also need to enable the `portable-atomic` feature.
+To enable `no_std` support in this crate, you will need to disable default features, and enable the `edge_executor` and `critical-section` features.
 
 [bevy]: https://bevyengine.org
 [rayon]: https://github.com/rayon-rs/rayon

docs/cargo_features.md

@@ -97,7 +97,6 @@ The default feature set enables most of the expected features of a game engine,
 |pbr_specular_textures|Enable support for specular textures in the `StandardMaterial`, at the risk of blowing past the global, per-shader texture limit on older/lower-end GPUs|
 |pbr_transmission_textures|Enable support for transmission-related textures in the `StandardMaterial`, at the risk of blowing past the global, per-shader texture limit on older/lower-end GPUs|
 |pnm|PNM image format support, includes pam, pbm, pgm and ppm|
-|portable-atomic|`portable-atomic` provides additional platform support for atomic types and operations, even on targets without native support. |
 |qoi|QOI image format support|
 |reflect_documentation|Enable documentation reflection|
 |reflect_functions|Enable function reflection|