Skip over unnecessary code diagnostics when hitting f8

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/editor/src/editor.rs

@@ -4211,6 +4211,7 @@ impl Editor {
             };
             let group = diagnostics.find_map(|entry| {
                 if entry.diagnostic.is_primary
+                    && !entry.diagnostic.is_unnecessary
                     && !entry.range.is_empty()
                     && Some(entry.range.end) != active_primary_range.as_ref().map(|r| *r.end())
                 {