[abhinavprakash-x]

Description

Removes lib/tests/integration_test/server/中文.txt as requested in issue #2449.

This file causes compilation issues on Windows.

Testing

• Successfully configured Drogon using CMake on Ubuntu (WSL).
• Successfully built Drogon, drogon_ctl, and the configured examples using GCC.

Closes #2449

[abhinavprakash-x]

While checking the references to 中文.txt, I noticed that it is also used in the integration tests:

• lib/tests/integration_test/client/main.cc uses it to test serving files with non-ASCII filenames.
• The same file uses it in an UploadFile test.
• lib/tests/CMakeLists.txt copies it into the integration-test server directory.

Should I remove these test usages as part of this issue, or would you prefer that I preserve the non-ASCII filename test coverage using a different approach?

I want to make sure removing the fixture doesn't unintentionally break the integration tests or reduce existing test coverage.