refactor(info): 删除多余的信息结构体文件

- 移除了多个未使用的 Java 和 Go 信息结构体文件
- 优化了项目结构，减少了冗余代码
- 这些文件可能是早期开发阶段的遗留代码，现在已不再需要

common/serialize/sturc/test_pack_init/pack_init_test.go

@@ -0,0 +1,29 @@
+package test_pack_init
+
+import (
+	"bytes"
+	"github.com/lunixbochs/struc"
+	"sync"
+	"testing"
+)
+
+type Example struct {
+	I int `struc:int`
+}
+
+// TestParallelPack checks whether Pack is goroutine-safe. Run it with -race flag.
+// Keep it as a single test in package since it is likely to be triggered on initialization
+// of global objects reported as a data race by race detector.
+func TestParallelPack(t *testing.T) {
+	var wg sync.WaitGroup
+	val := Example{}
+	for i := 0; i < 2; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			var buf bytes.Buffer
+			_ = struc.Pack(&buf, &val)
+		}()
+	}
+	wg.Wait()
+}