Merge #864

864: Remove `power` module r=kvark a=GabrielMajeri

**Connections**
Closes #859 

**Description**
Removes the `power.rs` module. If the user wants to detect the battery status and choose between low-power and high-performance, they can do so themselves.

**Testing**
Tested with core.

Co-authored-by: Gabriel Majeri <gabriel.majeri6@gmail.com>

wgpu-core/src/instance.rs

@@ -7,7 +7,7 @@ use crate::{
     device::Device,
     hub::{GfxBackend, Global, GlobalIdentityHandlerFactory, Input, Token},
     id::{AdapterId, DeviceId, SurfaceId, Valid},
-    power, span, LifeGuard, PrivateFeatures, Stored, MAX_BIND_GROUPS,
+    span, LifeGuard, PrivateFeatures, Stored, MAX_BIND_GROUPS,
 };
 
 use wgt::{Backend, BackendBit, DeviceDescriptor, PowerPreference, BIND_BUFFER_ALIGNMENT};
@@ -500,18 +500,9 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
         }
 
         let preferred_gpu = match desc.power_preference {
-            PowerPreference::Default => match power::is_battery_discharging() {
-                Ok(false) => discrete.or(integrated).or(other).or(virt),
-                Ok(true) => integrated.or(discrete).or(other).or(virt),
-                Err(err) => {
-                    tracing::debug!(
-                        "Power info unavailable, preferring integrated gpu ({})",
-                        err
-                    );
-                    integrated.or(discrete).or(other).or(virt)
-                }
-            },
-            PowerPreference::LowPower => integrated.or(other).or(discrete).or(virt),
+            PowerPreference::Default | PowerPreference::LowPower => {
+                integrated.or(other).or(discrete).or(virt)
+            }
             PowerPreference::HighPerformance => discrete.or(other).or(integrated).or(virt),
         };
 

wgpu-core/src/lib.rs

@@ -37,7 +37,6 @@ pub mod id;
 pub mod instance;
 pub mod logging;
 pub mod pipeline;
-pub mod power;
 pub mod resource;
 pub mod swap_chain;
 mod track;