wcc: delete unused warning counters and ww err twin

selfhost/cmd/wcc/check.ww

@@ -40,8 +40,7 @@ type checker = struct {
 // diagnostics. Tool-local (NOT a lib wrapper): messages are built from
 // many fragments and we route through os.write to avoid libc stdio.
 // .len replaces the error-prone hand-counted byte literals these sites
-// carried. Lives here (not err.ww) because the selfhost build pulls
-// check.ww but not err.ww (which ports err.c for the C-driven path).
+// carried.
 fn cerr(m: str) void = {
 	os.write(2, m.ptr, m.len: u64);
 };

selfhost/cmd/wcc/err.ww

@@ -1,38 +0,0 @@
-// Port of cmd/wcc/err.c. Plan 9 style: short, no levels beyond
-// fatal/error/warn. Output goes through os.write so we don't pull in
-// libc stdio.
-
-package wcc;
-
-import os;
-import fmt;
-
-type pos = struct {
-	file: str,
-	line: i32,
-	col:  i32,
-};
-
-let nerrors:   i32 = 0;
-let nwarnings: i32 = 0;
-
-export fn fatal(msg: str) void = {
-	fmt.errorln(msg);
-	os.exit(1);
-};
-
-export fn errorf(p: pos, msg: str) void = {
-	os.write(2, p.file.ptr, p.file.len: u64);
-	os.write(2, ": error: ".ptr, 9u64);
-	os.write(2, msg.ptr, msg.len: u64);
-	os.write(2, "\n".ptr, 1u64);
-	nerrors += 1;
-};
-
-export fn warnf(p: pos, msg: str) void = {
-	os.write(2, p.file.ptr, p.file.len: u64);
-	os.write(2, ": warning: ".ptr, 11u64);
-	os.write(2, msg.ptr, msg.len: u64);
-	os.write(2, "\n".ptr, 1u64);
-	nwarnings += 1;
-};