fix: remove deprecated linkLibC and linkLibCpp

build.zig

@@ -29,15 +29,15 @@ pub fn build(b: *std.Build) void {
     module.addIncludePath(b.path("libs/cbullet"));
     module.addIncludePath(b.path("libs/bullet"));
 
+    module.link_libc = true;
+    module.link_libcpp = true;
+
     const cbullet_lib = b.addLibrary(.{
         .name = "cbullet",
         .root_module = module,
     });
     b.installArtifact(cbullet_lib);
 
-    cbullet_lib.linkLibC();
-    cbullet_lib.linkLibCpp();
-
     const test_step = b.step("test", "Run zbullet tests");
 
     const zmath = b.dependency("zmath", .{});

src/zbullet.zig

@@ -1,6 +1,5 @@
 // Zig bindings for Bullet Physics SDK
 
-const builtin = @import("builtin");
 const std = @import("std");
 const Mutex = std.Thread.Mutex;
 const expect = std.testing.expect;