lib: banner purge + WHY-only comment sweep (rule 8)

Every // ---- section banner dies (132 -> 0): names carry the WHAT.
Narration deleted (filename restatements, run-with lines, what-the-
next-line-does); every ref/hare cite, task cite, divergence, ABI/
layout contract, and ownership qualifier kept (borrowed-view lines
restored where the sweep over-cut). Comment-only proven: all 442
walk-workdir .s and 32 import-probe .s byte-identical before/after;
libbyteid 56-roster all-ID.

lib/log/log.ww

@@ -2,24 +2,6 @@
 // Subset of Hare's lib/log (ref/hare/log/{logger,funcs,global,silent}.ha).
 // Project #94 fold-eFinal.
 //
-// Surface:
-//
-//   log.logger     — vtable with `println` + `printfln` slots
-//   log.stdlogger  — first-field embed of logger + an io.stream sink
-//   log.new        (sink: io.stream) stdlogger
-//   log.silent     *logger — a logger that discards every record
-//   log.default    *logger — a stdlogger writing to stderr
-//   log.global     *logger — the dispatch target for [[println]] / [[fatal]]
-//   log.println    (args: fmt.formattable...) void
-//   log.lprintln   (log: *logger, args: fmt.formattable...) void
-//   log.printfln   (format: str, fields: fmt.field...) void
-//   log.lprintfln  (log: *logger, format: str, fields: fmt.field...) void
-//   log.fatal      (args: fmt.formattable...) never
-//   log.lfatal     (log: *logger, args: fmt.formattable...) never
-//   log.fatalf     (format: str, fields: fmt.field...) never
-//   log.lfatalf    (log: *logger, format: str, fields: fmt.field...) never
-//   log.setlogger  (log: *logger) void
-//
 // VALUE-RETURN (Hare ref/hare/log/logger.ha:20): [[new]] builds a
 // stdlogger in a local and `return r;` (proven field-by-field sret).
 // stdlogger is 24B (two fn-ptrs + sink), returned via the SysV memory
@@ -111,7 +93,6 @@ export let silent:  *logger;
 export let default: *logger;
 export let global:  *logger;
 
-// initdone — guards [[ensureinit]] so the one-shot wiring runs once.
 let initdone: i32 = 0;
 
 fn ensureinit() void = {
@@ -183,8 +164,6 @@ fn stdprintfln(l: *logger, format: str, fields: fmt.field...) void = {
 fn silentprintln(l: *logger, args: fmt.formattable...) void = { };
 fn silentprintfln(l: *logger, format: str, fields: fmt.field...) void = { };
 
-// ---- public API ----------------------------------------------------------
-
 // new — build a stdlogger over `sink`, returned BY VALUE. Mirrors
 // ref/hare/log/logger.ha:20.
 export fn new(sink: io.stream) stdlogger = {

lib/log/silent_test.ww

@@ -23,9 +23,7 @@ import memio;
 	assert(!(mem.pos != 0));
 };
 
-// The silent logger's printfln callback discards args without touching
-// fmt or any sink. Same pattern as [[silentwritesnothing]] for the
-// bare-args path.
+// Same pattern as [[silentwritesnothing]] for the bare-args path.
 @test fn silentignoresprintfln() void = {
 	let buf: [16]u8;
 	let mem = memio.fixed(buf[0:16]);