[PACKET_IO]format code style

src/common/global_var.cpp

@@ -8,26 +8,6 @@
 ***********************************************************************************************
 */
 
-#include <string.h>
-
 #include "global_var.h"
 
-struct stellar_engine g_engine_instance;
-
-int strncpy_safe(char *dst, const char *src, size_t dst_size)
-{
-	if (nullptr == dst || nullptr == src || dst_size == 0) {
-        return -1;
-    }
-    
-    size_t slen = strlen(src);
-    if (slen >= dst_size) {
-        strncpy(dst, src, dst_size);
-        dst[dst_size - 1] = '\0';
-    } else {
-        strcpy(dst, src);
-        dst[slen - 1] = '\0';
-    }
-    
-    return 0;
-}
+struct stellar_engine g_engine_instance;