chore(deps): clean up cargo shear findings (#6679)

Remove unused direct dependency declarations found by cargo-shear and delete the unlinked ecstore mimalloc diagnostics file.

Keep feature-forwarding dependencies explicit with package-local cargo-shear ignores so hotpath feature propagation remains intact.

Co-authored-by: heihutu <heihutu@gmail.com>

crates/lifecycle/Cargo.toml

@@ -25,6 +25,9 @@ keywords = ["lifecycle", "storage", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-lifecycle/latest/rustfs_lifecycle/"
 
+[package.metadata.cargo-shear]
+ignored = ["rustfs-common"]
+
 [features]
 default = []
 hotpath = [