Revert "TURBOPACK: Fix subpath imports resolving to dependencies"

[yuzheng14]

Reverts #150

Upstream has merged

[gemini-code-assist]

Code Review

This pull request simplifies the resolution logic in turbopack-core by removing the ExportImport enum and its associated conditional logic in handle_exports_imports_field, which streamlines the request parsing process. Additionally, the dep-in-nm dependency and its corresponding test cases have been removed. Feedback was provided to optimize the code by removing an unnecessary .clone() call on result_path when constructing the Pattern::Concatenation vector, as the variable is not used subsequently.

[gemini-code-assist]

The result_path variable is not used after being moved into the Pattern::Concatenation vector. Since it is an owned Pattern (returned by with_normalized_path), calling .clone() is unnecessary and incurs an extra allocation. You can move it directly.

            let request = *Request::parse(Pattern::Concatenation(vec![
                Pattern::Constant(rcstr!("./")),
                result_path,
            ]))
            .to_resolved()
            .await?;