Delete obsolete integration tests

Author: uklotzde

tests/integration_test.rs

@@ -1,8 +1,8 @@
 use core::{ffi, ptr};
 
 use open62541_sys::{
-    va_end, va_list_, vsnprintf, UA_Client_delete, UA_Client_new, UA_LogCategory, UA_LogLevel,
-    UA_Logger, UA_LoggerClearCallback_, UA_LoggerLogCallback_,
+    va_list_, UA_Client_delete, UA_Client_new, UA_LogCategory, UA_LogLevel, UA_Logger,
+    UA_LoggerClearCallback_, UA_LoggerLogCallback_,
 };
 
 #[test]
@@ -49,17 +49,3 @@ fn logger_types() {
         clear,
     };
 }
-
-#[test]
-fn has_vsnprintf() {
-    // Make sure that `vsnprintf()` is available. On Microsoft Windows we have to provide a wrapper,
-    // to support older versions of the C library (before the introduction of the UCRT/Visual Studio
-    // 2015/Windows 10).
-    let _unused = vsnprintf;
-}
-
-#[test]
-fn has_va_end() {
-    // Make sure that `va_end()` is available.
-    let _unused = va_end;
-}