unnecessary_ignore

The diagnostic '{0}' isn't produced at this location so it doesn't need to be ignored.

The diagnostic '{0}' isn't produced in this file so it doesn't need to be ignored.

The analyzer produces this diagnostic when an ignore is specified to ignore a diagnostic that isn't produced.

The following code produces this diagnostic because the unused_local_variable diagnostic isn't reported at the ignored location:

// ignore: unused_local_variable
void f() {}

Remove the ignore comment:

void f() {}