Rollup merge of #115832 - Zalathar:fix-no-coverage, r=oli-obk

Fix the error message for `#![feature(no_coverage)]`

When #114656 was written, the feature flag to replace `no_coverage` was originally spelled `coverage`, but it was eventually changed to `coverage_attribute` instead.

That update happened to miss this error message in `removed.rs`, and unfortunately I only noticed just *after* the original PR was approved and merged.

cc ``@bossmc`` (original author) ``@oli-obk`` (original reviewer)
``@rustbot`` label +A-code-coverage

compiler/rustc_feature/src/removed.rs

@@ -137,8 +137,8 @@ declare_features! (
     /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8
     (removed, negate_unsigned, "1.0.0", Some(29645), None, None),
     /// Allows `#[no_coverage]` on functions.
-    /// The feature was renamed to `coverage` and the attribute to `#[coverage(on|off)]`
-    (removed, no_coverage, "CURRENT_RUSTC_VERSION", Some(84605), None, Some("renamed to `coverage`")),
+    /// The feature was renamed to `coverage_attribute` and the attribute to `#[coverage(on|off)]`
+    (removed, no_coverage, "CURRENT_RUSTC_VERSION", Some(84605), None, Some("renamed to `coverage_attribute`")),
     /// Allows `#[no_debug]`.
     (removed, no_debug, "1.43.0", Some(29721), None, Some("removed due to lack of demand")),
     /// Allows using `#[on_unimplemented(..)]` on traits.

tests/ui/feature-gates/feature-gate-coverage-attribute.stderr

@@ -4,7 +4,7 @@ error[E0557]: feature has been removed
 LL | #![feature(no_coverage)]
    |            ^^^^^^^^^^^ feature has been removed
    |
-   = note: renamed to `coverage`
+   = note: renamed to `coverage_attribute`
 
 error[E0658]: the `#[coverage]` attribute is an experimental feature
   --> $DIR/feature-gate-coverage-attribute.rs:10:1