fix non-existing ToPredicate trait error

Author: zetanumbers

compiler/rustc_middle/src/ty/util.rs

@@ -4,8 +4,8 @@ use crate::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use crate::query::{IntoQueryParam, Providers};
 use crate::ty::layout::{FloatExt, IntegerExt};
 use crate::ty::{
-    self, Asyncness, FallibleTypeFolder, ToPredicate, Ty, TyCtxt, TypeFoldable, TypeFolder,
-    TypeSuperFoldable, TypeVisitableExt, Upcast,
+    self, Asyncness, FallibleTypeFolder, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperFoldable,
+    TypeVisitableExt, Upcast,
 };
 use crate::ty::{GenericArgKind, GenericArgsRef};
 use rustc_apfloat::Float as _;