Revert "Sema: Stop adding Windows implib link inputs for extern "..." syntax."

This reverts commit b461d07a54.

After some discussion in the team, we've decided that this is too disruptive,
especially because the linker errors are less than helpful. That's a fixable
problem, so we might reconsider this in the future, but revert it for now.

build.zig

@@ -452,7 +452,6 @@ pub fn build(b: *std.Build) !void {
         .desc = "Run the behavior tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{},
-        .windows_libs = &.{},
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .skip_freebsd = skip_freebsd,
@@ -475,7 +474,6 @@ pub fn build(b: *std.Build) !void {
         .desc = "Run the @cImport tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{"test/c_import"},
-        .windows_libs = &.{},
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .skip_freebsd = skip_freebsd,
@@ -496,7 +494,6 @@ pub fn build(b: *std.Build) !void {
         .desc = "Run the compiler_rt tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{},
-        .windows_libs = &.{},
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .skip_freebsd = skip_freebsd,
@@ -518,7 +515,6 @@ pub fn build(b: *std.Build) !void {
         .desc = "Run the zigc tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{},
-        .windows_libs = &.{},
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .skip_freebsd = skip_freebsd,
@@ -540,12 +536,6 @@ pub fn build(b: *std.Build) !void {
         .desc = "Run the standard library tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{},
-        .windows_libs = &.{
-            "advapi32",
-            "crypt32",
-            "iphlpapi",
-            "ws2_32",
-        },
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .skip_freebsd = skip_freebsd,
@@ -743,12 +733,6 @@ fn addCompilerMod(b: *std.Build, options: AddCompilerModOptions) *std.Build.Modu
     compiler_mod.addImport("aro", aro_mod);
     compiler_mod.addImport("aro_translate_c", aro_translate_c_mod);
 
-    if (options.target.result.os.tag == .windows) {
-        compiler_mod.linkSystemLibrary("advapi32", .{});
-        compiler_mod.linkSystemLibrary("crypt32", .{});
-        compiler_mod.linkSystemLibrary("ws2_32", .{});
-    }
-
     return compiler_mod;
 }
 
@@ -1446,10 +1430,6 @@ fn generateLangRef(b: *std.Build) std.Build.LazyPath {
         }),
     });
 
-    if (b.graph.host.result.os.tag == .windows) {
-        doctest_exe.root_module.linkSystemLibrary("advapi32", .{});
-    }
-
     var dir = b.build_root.handle.openDir("doc/langref", .{ .iterate = true }) catch |err| {
         std.debug.panic("unable to open '{f}doc/langref' directory: {s}", .{
             b.build_root, @errorName(err),