v8_prof_polyfill: remove unused catch bindings

PR-URL: https://github.com/nodejs/node/pull/24079
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Wyatt Preul <wpreul@gmail.com>

lib/internal/v8_prof_polyfill.js

@@ -140,7 +140,7 @@ function macCppfiltNm(out) {
     filtered = cp.spawnSync('c++filt', [ '-p' , '-i' ], {
       input: entries.join('\n')
     }).stdout.toString();
-  } catch (e) {
+  } catch {
     return out;
   }