rust/drm: Remove imports covered by prelude::*

This just removes any explicit imports of items in files that are already
being pulled in by `use prelude::*;`.

There should be no functional changes in this patch.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patch.msgid.link/20260122214316.3281257-2-lyude@redhat.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

rust/kernel/drm/device.rs

@@ -12,10 +12,7 @@
         self,
         driver::AllocImpl, //
     },
-    error::{
-        from_err_ptr,
-        Result, //
-    },
+    error::from_err_ptr,
     prelude::*,
     sync::aref::{
         ARef,

rust/kernel/drm/driver.rs

@@ -9,14 +9,10 @@
     device,
     devres,
     drm,
-    error::{
-        to_result,
-        Result, //
-    },
+    error::to_result,
     prelude::*,
     sync::aref::ARef, //
 };
-use macros::vtable;
 
 /// Driver use the GEM memory manager. This should be set for all modern drivers.
 pub(crate) const FEAT_GEM: u32 = bindings::drm_driver_feature_DRIVER_GEM;

rust/kernel/drm/file.rs

@@ -7,14 +7,10 @@
 use crate::{
     bindings,
     drm,
-    error::Result,
     prelude::*,
     types::Opaque, //
 };
-use core::{
-    marker::PhantomData,
-    pin::Pin, //
-};
+use core::marker::PhantomData;
 
 /// Trait that must be implemented by DRM drivers to represent a DRM File (a client instance).
 pub trait DriverFile {

rust/kernel/drm/gem/mod.rs

@@ -5,7 +5,6 @@
 //! C header: [`include/drm/drm_gem.h`](srctree/include/drm/drm_gem.h)
 
 use crate::{
-    alloc::flags::*,
     bindings,
     drm::{
         self,
@@ -14,10 +13,7 @@
             AllocOps, //
         },
     },
-    error::{
-        to_result,
-        Result, //
-    },
+    error::to_result,
     prelude::*,
     sync::aref::{
         ARef,