Hojun-Cho
17765942f9
mem.ww has 0 callers post-γ-6 — newarena/amalloc/grow/freearena/ roundup all unreferenced after the *arena cascade strip. Drop the 91-line module. Makefile: remove mem.ww from 5 dep lists (wwdump_ww, w6c_ww, w6a_ww, w6l_ww, ww_ww); drop `-I selfhost/cmd/wcc` from w6a_ww/ w6l_ww/ww_ww build invocations (wwdump_ww + w6c_ww still need it for check.ww/cgen*.ww). test/wcc/990_selfhost.c: drop 6 mem.ww entries from probe_codegen, probe_dump_diff (×2), probe_resolve, probe_dump_stable, and probe_cgen_match file lists. lib/memio/memio.ww: dynamicgrow doc comment reframed as historical context (collision source is gone, but task #9 keeps the module-prefixed name conservative against future collisions). Two dead `import mem;` lines remain in selfhost/cmd/w6a/asm.ww and selfhost/test/uses.ww; tolerated silently by ww build, swept in task #8. main.combined.ww auto-regenerated for w6a/w6c/wwdump. Verified 132/132 incl. 994_w6c_ww + 995_self_rebuild byte-identity. Phase 0 closes.