Remove unnecessary dependency

Cargo.lock

@@ -50,15 +50,6 @@ version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
 
-[[package]]
-name = "atomic"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3410529e8288c463bedb5930f82833bc0c90e5d2fe639a56582a4d09220b281"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -125,7 +116,6 @@ dependencies = [
 name = "cache_utils"
 version = "0.1.0"
 dependencies = [
- "atomic",
  "bitvec",
  "cpuid",
  "hashbrown",

cache_utils/Cargo.toml

@@ -13,7 +13,6 @@ cpuid = { path = "../cpuid", default-features = false }
 x86_64 = "0.14.1"
 static_assertions = "1.1.0"
 itertools = { version = "0.10.0", default-features = false }
-atomic = "0.5.0"
 
 nix = { version = "0.20.0", optional = true }
 libc = { version = "0.2.92", optional = true }