*: update coverage_attribute handling

- remove allow(stable_features), coverage_attribute stabilization was
  reverted
- remove coverage(off) from tests/, as cargo llvm-cov already takes
  care of excluding tests/ form coverage

repology-vulnupdater/src/main.rs

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #![feature(duration_constructors)]
-#![allow(stable_features)] // for coverage_attribute, remove after switching to newer nighly on prod
 #![feature(coverage_attribute)]
 
 mod args;

repology-webapp-test-utils/src/lib.rs

@@ -1,7 +1,6 @@
 // SPDX-FileCopyrightText: Copyright 2024 Dmitry Marakasov <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#![allow(stable_features)] // for coverage_attribute, remove after switching to newer nighly on prod
 #![feature(coverage_attribute)]
 
 pub mod http;

repology-webapp/src/lib.rs

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #![feature(iterator_try_collect)]
-#![allow(stable_features)] // for coverage_attribute, remove after switching to newer nighly on prod
 #![feature(coverage_attribute)]
 #![feature(stmt_expr_attributes)]
 #![feature(assert_matches)]

repology-webapp/tests/integration.rs

@@ -1,8 +1,4 @@
 // SPDX-FileCopyrightText: Copyright 2024 Dmitry Marakasov <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#![allow(stable_features)] // for coverage_attribute, remove after switching to newer nighly on prod
-#![feature(coverage_attribute)]
-#![coverage(off)]
-
 mod integration_tests;

repology-webapp/tests/snapshot.rs

@@ -1,8 +1,4 @@
 // SPDX-FileCopyrightText: Copyright 2024 Dmitry Marakasov <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#![allow(stable_features)] // for coverage_attribute, remove after switching to newer nighly on prod
-#![feature(coverage_attribute)]
-#![coverage(off)]
-
 mod snapshot_tests;