fix mod-static-with-const-fn.rs.

src/test/ui/consts/const-eval/mod-static-with-const-fn.rs

@@ -25,11 +25,9 @@ unsafe impl Sync for Foo {}
 
 static BAR: () = unsafe {
     *FOO.0.get() = 5;
-    //~^ ERROR calls in statics are limited to constant functions, tuple structs and tuple variants
-
+    //~^ ERROR statements in statics are unstable (see issue #48821)
     // This error is caused by a separate bug that the feature gate error is reported
     // even though the feature gate "const_let" is active.
-    //~| statements in statics are unstable (see issue #48821)
 };
 
 fn main() {