Simplify rustc_lint_defs::lint_array

Author: DaniPopes

compiler/rustc_lint_defs/src/lib.rs

@@ -788,10 +788,7 @@ macro_rules! declare_tool_lint {
 /// Declares a static `LintArray` and return it as an expression.
 #[macro_export]
 macro_rules! lint_array {
-    ($( $lint:expr ),* ,) => { lint_array!( $($lint),* ) };
-    ($( $lint:expr ),*) => {{
-        vec![$($lint),*]
-    }}
+    ($( $lint:expr ),* $(,)?) => { vec![$($lint),*] }
 }
 
 pub type LintArray = Vec<&'static Lint>;