next.js

15942fcc - perf(turbopack): Drop AST node before generating source maps (#79219)

perf(turbopack): Drop AST node before generating source maps (#79219) ### What? Source map generation uses lots of memory, so drop another memory hog before performing it. For `minify()`, we were already doing it, although it seems unintentional. ### Why? x-ref: Numbers in https://vercel.slack.com/archives/C06PPGZ0FD3/p1747245989125859?thread_ts=1746834549.272939&cid=C06PPGZ0FD3