8022178: System.console() throws IOE on some Windows

Summary: to remove the IOE throwing code
Reviewed-by: alanb

src/windows/native/java/io/Console_md.c

@@ -38,12 +38,10 @@ Java_java_io_Console_istty(JNIEnv *env, jclass cls)
 {
     if (hStdIn == INVALID_HANDLE_VALUE &&
         (hStdIn = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
-        JNU_ThrowIOExceptionWithLastError(env, "Open Console input failed");
         return JNI_FALSE;
     }
     if (hStdOut == INVALID_HANDLE_VALUE &&
         (hStdOut = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
-        JNU_ThrowIOExceptionWithLastError(env, "Open Console output failed");
         return JNI_FALSE;
     }
     if (GetFileType(hStdIn) != FILE_TYPE_CHAR ||