Simplify `ty::ClosureKind::extends`

This is valid per the comment of the `ClosureKind` defition

1 files changed, 1 insertions, 9 deletions

diff --git a/compiler/rustc_middle/src/ty/closure.rs b/compiler/rustc_middle/src/ty/closure.rs
index 2653c8576de..e0bd4909810 100644
--- a/compiler/rustc_middle/src/ty/closure.rs
+++ b/compiler/rustc_middle/src/ty/closure.rs
@@ -97,15 +97,7 @@ impl<'tcx> ClosureKind {
     /// Returns `true` if a type that impls this closure kind
     /// must also implement `other`.
     pub fn extends(self, other: ty::ClosureKind) -> bool {
-        matches!(
-            (self, other),
-            (ClosureKind::Fn, ClosureKind::Fn)
-                | (ClosureKind::Fn, ClosureKind::FnMut)
-                | (ClosureKind::Fn, ClosureKind::FnOnce)
-                | (ClosureKind::FnMut, ClosureKind::FnMut)
-                | (ClosureKind::FnMut, ClosureKind::FnOnce)
-                | (ClosureKind::FnOnce, ClosureKind::FnOnce)
-        )
+        self <= other
     }
 
     /// Returns the representative scalar type for this closure kind.