this empty import workaround no longer necessary

CMakeLists.txt

@@ -476,7 +476,6 @@ set(ZIG_STD_FILES
     "dwarf.zig"
     "dynamic_library.zig"
     "elf.zig"
-    "empty.zig"
     "event.zig"
     "event/channel.zig"
     "event/fs.zig"

std/c.zig

@@ -7,9 +7,8 @@ pub use switch (builtin.os) {
     Os.macosx, Os.ios => @import("c/darwin.zig"),
     Os.freebsd => @import("c/freebsd.zig"),
     Os.netbsd => @import("c/netbsd.zig"),
-    else => empty_import,
+    else => struct {},
 };
-const empty_import = @import("empty.zig");
 
 // TODO https://github.com/ziglang/zig/issues/265 on this whole file
 

std/std.zig

@@ -24,7 +24,6 @@ pub const cstr = @import("cstr.zig");
 pub const debug = @import("debug.zig");
 pub const dwarf = @import("dwarf.zig");
 pub const elf = @import("elf.zig");
-pub const empty_import = @import("empty.zig");
 pub const event = @import("event.zig");
 pub const fmt = @import("fmt.zig");
 pub const hash = @import("hash.zig");
@@ -72,7 +71,6 @@ test "std" {
     _ = @import("dwarf.zig");
     _ = @import("dynamic_library.zig");
     _ = @import("elf.zig");
-    _ = @import("empty.zig");
     _ = @import("event.zig");
     _ = @import("fmt.zig");
     _ = @import("hash.zig");