chore: clean .gitignore cache

tools/build.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-# Deterministic, fast backend build step for CI/CodeQL extraction
-# Use `go list` to avoid long-running builds and network downloads.
-# Set GOPROXY to a standard proxy to avoid interactive network issues.
-set -euo pipefail
-cd backend
-export GOPROXY=${GOPROXY:-https://proxy.golang.org}
-export GOMODCACHE=${GOMODCACHE:-$(go env GOMODCACHE)}
-# First, list packages for fast JS extraction/diagnostics
-go list ./...
-# Ensure dependencies are downloaded and run a proper Go build so CodeQL can extract symbols
-go mod download
-go build ./...