bless caller-location test

Author: RalfJung

src/test/ui/rfc-2091-track-caller/caller-location-fnptr-rt-ctfe-equiv.rs

@@ -15,7 +15,7 @@ const fn attributed() -> L {
     std::intrinsics::caller_location()
 }
 
-const fn calling_attributed() -> L { //~ WARN skipping const checks
+const fn calling_attributed() -> L {
     // We need `-Z unleash-the-miri-inside-of-you` for this as we don't have `const fn` pointers.
     let ptr: fn() -> L = attributed;
     ptr()

src/test/ui/rfc-2091-track-caller/caller-location-fnptr-rt-ctfe-equiv.stderr

@@ -1,12 +1,10 @@
 warning: skipping const checks
-  --> $DIR/caller-location-fnptr-rt-ctfe-equiv.rs:18:1
    |
-LL | / const fn calling_attributed() -> L {
-LL | |     // We need `-Z unleash-the-miri-inside-of-you` for this as we don't have `const fn` pointers.
-LL | |     let ptr: fn() -> L = attributed;
-LL | |     ptr()
-LL | | }
-   | |_^
+help: skipping check that does not even have a feature gate
+  --> $DIR/caller-location-fnptr-rt-ctfe-equiv.rs:21:5
+   |
+LL |     ptr()
+   |     ^^^^^
 
 warning: 1 warning emitted