fix: configure tests to run by removing deprecated test config and adding missing import

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

Cargo.toml

@@ -6,9 +6,6 @@ description = "Keep and manage temporary files with automatic compression and me
 readme = "README.md"
 categories = ["command-line-utilities"]
 
-[[test]]
-name = "tests"
-path = "src/tests.rs"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html