chore(puffin): remove tests (#2789)

Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>

src/puffin/src/lib.rs

@@ -17,6 +17,3 @@ pub mod error;
 pub mod file_format;
 pub mod file_metadata;
 pub mod partial_reader;
-
-#[cfg(test)]
-mod tests;