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>

Cargo.lock

@@ -9380,7 +9380,6 @@ dependencies = [
  "rustfs-log-analyzer",
  "rustfs-madmin",
  "rustfs-mimalloc",
- "rustfs-mimalloc-sys",
  "rustfs-notify",
  "rustfs-object-capacity",
  "rustfs-object-data-cache",
@@ -9581,7 +9580,6 @@ dependencies = [
  "bytesize",
  "chrono",
  "criterion",
- "enumset",
  "faster-hex",
  "flatbuffers",
  "futures",
@@ -9615,7 +9613,6 @@ dependencies = [
  "path-absolutize",
  "pin-project-lite",
  "proptest",
- "quick-xml 0.42.0",
  "rand 0.10.2",
  "ratelimit",
  "rcgen",
@@ -9661,11 +9658,9 @@ dependencies = [
  "serde_json",
  "serde_urlencoded",
  "serial_test",
- "sha1 0.11.0",
  "sha2 0.11.0",
  "shadow-rs",
  "smallvec",
- "starshard",
  "temp-env",
  "tempfile",
  "thiserror 2.0.20",