Fix pre-existing clippy errors in buck2_query and starlark

- Remove redundant `v as u32` cast in deps() where v is already u32
- Suppress extra_unused_type_parameters on DeserTypeId::of<T>() stub
  (T is needed for API compatibility but unused in the non-pagable stub)

Made-with: Cursor

Author: dkranchii

app/buck2_query/src/query/environment.rs

@@ -395,7 +395,7 @@ pub async fn deps<Env: QueryEnvironment + ?Sized>(
 
     match depth {
         QueryValueDepth::Bounded(v) => {
-            env.depth_limited_traversal(targets, visitor, visit, v as u32)
+            env.depth_limited_traversal(targets, visitor, visit, v)
                 .await?;
         }
         QueryValueDepth::Unbounded => {

starlark-rust/starlark/src/pagable.rs

@@ -44,6 +44,7 @@ pub(crate) struct DeserTypeId;
 
 #[cfg(not(feature = "pagable"))]
 impl DeserTypeId {
+    #[allow(clippy::extra_unused_type_parameters)]
     pub const fn of<T: ?Sized>() -> Self {
         DeserTypeId
     }