Remove unimplemented InternPool dump stubs

Both zig_dump_intern_pool and c_dump_intern_pool were unimplemented stubs
with no callers. InternPool correctness is validated by unit tests and Air
comparison.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

build.zig

@@ -10,8 +10,8 @@ const assert = std.debug.assert;
 const DevEnv = @import("src/dev.zig").Env;
 const ValueInterpretMode = enum { direct, by_name };
 
-const zig0_headers = &[_][]const u8{ "common.h", "ast.h", "parser.h", "zir.h", "astgen.h", "intern_pool.h", "air.h", "type.h", "value.h", "sema.h", "dump.h", "verbose_intern_pool.h" };
-const zig0_c_lib_files = &[_][]const u8{ "tokenizer.c", "ast.c", "zig0.c", "parser.c", "zir.c", "astgen.c", "intern_pool.c", "air.c", "type.c", "value.c", "sema.c", "verbose_intern_pool.c" };
+const zig0_headers = &[_][]const u8{ "common.h", "ast.h", "parser.h", "zir.h", "astgen.h", "intern_pool.h", "air.h", "type.h", "value.h", "sema.h", "dump.h" };
+const zig0_c_lib_files = &[_][]const u8{ "tokenizer.c", "ast.c", "zig0.c", "parser.c", "zir.c", "astgen.c", "intern_pool.c", "air.c", "type.c", "value.c", "sema.c" };
 const zig0_all_c_files = zig0_c_lib_files ++ &[_][]const u8{"main.c"};
 const zig0_cflags = &[_][]const u8{
     "-std=c11",

src/verbose_air.zig

@@ -9,10 +9,6 @@ const Compilation = zig_internals.Compilation;
 const Package = zig_internals.Package;
 const Air = zig_internals.Air;
 
-comptime {
-    _ = @import("verbose_intern_pool.zig");
-}
-
 /// Matches C `Air` struct layout (air.h).
 const CAir = extern struct {
     inst_len: u32,

src/verbose_intern_pool.zig

@@ -1,23 +0,0 @@
-// verbose_intern_pool.zig — Zig-side dumper for InternPool text output.
-// Compiles source via the Zig compiler pipeline and dumps the InternPool.
-// Exports a C-compatible function for use by stage0 tests.
-
-const std = @import("std");
-
-const DumpResult = extern struct {
-    text: ?[*:0]u8,
-    error_msg: ?[*:0]u8,
-};
-
-export fn zig_dump_intern_pool(
-    source_ptr: [*]const u8,
-    source_len: usize,
-) DumpResult {
-    // Stub: not yet implemented.
-    _ = source_ptr;
-    _ = source_len;
-    const gpa = std.heap.c_allocator;
-    const result = gpa.dupeZ(u8, "") catch
-        return .{ .text = null, .error_msg = null };
-    return .{ .text = result.ptr, .error_msg = null };
-}

stage0/dump.h

@@ -14,12 +14,4 @@ typedef struct {
 extern AirCompareResult zig_compare_air(const char* src_path, const void* c_funcs, uint32_t c_func_count);
 extern void zig_compare_result_free(AirCompareResult* result);
 
-// InternPool dumper (text-based, separate concern).
-typedef struct {
-    char* text;      // Heap-allocated, NULL on error. Caller frees.
-    char* error_msg; // Heap-allocated, NULL on success. Caller frees.
-} DumpResult;
-
-extern DumpResult zig_dump_intern_pool(const char* source, size_t len);
-
 #endif

stage0/verbose_intern_pool.c

@@ -1,13 +0,0 @@
-// verbose_intern_pool.c — C-side InternPool text dumper.
-// Formats InternPool entries as text matching the Zig-side format.
-
-#include "verbose_intern_pool.h"
-#include <stdlib.h>
-
-char* c_dump_intern_pool(const InternPool* ip) {
-    (void)ip;
-    // Stub: return empty string for now.
-    char* result = malloc(1);
-    if (result) result[0] = '\0';
-    return result;
-}

stage0/verbose_intern_pool.h

@@ -1,11 +0,0 @@
-// verbose_intern_pool.h — C-side InternPool text dumper.
-#ifndef _ZIG0_VERBOSE_INTERN_POOL_H__
-#define _ZIG0_VERBOSE_INTERN_POOL_H__
-
-#include "intern_pool.h"
-
-// Format C InternPool as text matching the Zig-side format.
-// Returns heap-allocated string. Caller frees.
-char* c_dump_intern_pool(const InternPool* ip);
-
-#endif