Two minor use fixups.

I *think* this addresses what the `FIXME` comments are asking for.

Author: nnethercote

compiler/rustc_middle/src/traits/mod.rs

@@ -21,13 +21,12 @@ use rustc_macros::{
 };
 use rustc_span::def_id::{CRATE_DEF_ID, LocalDefId};
 use rustc_span::{DUMMY_SP, Span, Symbol};
-// FIXME: Remove this import and import via `solve::`
-pub use rustc_type_ir::solve::BuiltinImplSource;
 use smallvec::{SmallVec, smallvec};
 use thin_vec::ThinVec;
 
 pub use self::select::{EvaluationCache, EvaluationResult, OverflowError, SelectionCache};
 use crate::mir::ConstraintCategory;
+pub use crate::traits::solve::BuiltinImplSource;
 use crate::ty::abstract_const::NotConstEvaluatable;
 use crate::ty::{self, AdtKind, GenericArgsRef, Ty};
 

compiler/rustc_middle/src/traits/query.rs

@@ -7,11 +7,10 @@
 
 use rustc_macros::{HashStable, TypeFoldable, TypeVisitable};
 use rustc_span::Span;
-// FIXME: Remove this import and import via `traits::solve`.
-pub use rustc_type_ir::solve::NoSolution;
 
 use crate::error::DropCheckOverflow;
 use crate::infer::canonical::{Canonical, CanonicalQueryInput, QueryResponse};
+pub use crate::traits::solve::NoSolution;
 use crate::ty::{self, GenericArg, Ty, TyCtxt};
 
 pub mod type_op {