[ty] ignore possibly-unresolved-reference by default

crates/ty_python_semantic/src/types/diagnostic.rs

@@ -851,7 +851,7 @@ declare_lint! {
     pub(crate) static POSSIBLY_UNRESOLVED_REFERENCE = {
         summary: "detects references to possibly undefined names",
         status: LintStatus::preview("1.0.0"),
-        default_level: Level::Warn,
+        default_level: Level::Ignore,
     }
 }