refactor(type-resolver): P3a — delete dead resolveIndexedAccessType

[cs01]

Summary

TypeResolver.resolveIndexedAccessType has zero callers across the repo. Removing it reduces the surface area of the type-resolution unification (plan P3a, after #525).

Impact for users

None — dead code removal. Same compiler output, smaller resolver footprint.

Test plan

• npm run verify green (stage 2 self-hosting + tests)
• Repo-wide grep confirms no callers

[github-actions]

Benchmark Results (Linux x86-64)

Benchmark	C	ChadScript	Go	Node	Place
Binary Trees	1.396s	1.261s	2.731s	1.200s	🥈
Cold Start	0.8ms	0.8ms	1.2ms	27.1ms	🥇
Fibonacci	0.814s	0.763s	1.557s	3.159s	🥇
File I/O	0.118s	0.090s	0.086s	0.207s	🥈
JSON Parse/Stringify	0.004s	0.005s	0.017s	0.015s	🥈
Matrix Multiply	0.464s	0.711s	0.611s	0.374s	#4
Monte Carlo Pi	0.389s	0.410s	0.404s	2.248s	🥉
N-Body Simulation	1.670s	2.113s	2.203s	2.411s	🥈
Quicksort	0.214s	0.246s	0.213s	0.262s	🥉
SQLite	0.353s	0.367s	—	0.421s	🥈
Sieve of Eratosthenes	0.015s	0.027s	0.018s	0.039s	🥉
String Manipulation	0.008s	0.018s	0.016s	0.037s	🥉

CLI Tool Benchmarks

Benchmark	ChadScript	grep	node	xxd	Place
Hex Dump	0.431s	—	1.012s	0.134s	🥈
Recursive Grep	0.019s	0.010s	0.099s	—	🥈