What problems was I solving

The summary.ts file in the heap-analysis-tools library imported NODE_FIELD_COUNT from ./types.js even though the constant was never referenced anywhere in the file, leaving dead code in the module.

What user-facing changes did I ship

None. This is a non-behavioral dead-code cleanup in an internal heap analysis tooling library.

How I implemented it

Removed the unused NODE_FIELD_COUNT import specifier from the ./types.js import declaration in architect/heap-analysis-tools/main/summary.ts, leaving all other imports and the file's logic unchanged.

Description for the changelog

Removed an unused NODE_FIELD_COUNT import from architect/heap-analysis-tools/main/summary.ts. The constant is still exported from types.ts and used by other modules such as stream-parser.ts; there is no runtime or API impact.