Remove alloc feature from crossbeam-utils

Cargo.toml

@@ -30,7 +30,7 @@ std = [
   "crossbeam-queue/std",
   "crossbeam-utils/std",
 ]
-alloc = ["crossbeam-epoch/alloc", "crossbeam-utils/alloc", "crossbeam-queue/alloc"]
+alloc = ["crossbeam-epoch/alloc", "crossbeam-queue/alloc"]
 
 [dependencies]
 cfg-if = "0.1.2"

ci/crossbeam-utils.sh

@@ -15,8 +15,5 @@ if [[ "$RUST_VERSION" == "nightly" ]]; then
 
     # Check for no_std environment.
     cargo check --target thumbv7m-none-eabi --no-default-features
-    cargo check --target thumbv7m-none-eabi --no-default-features --features alloc
-    cargo check --target thumbv7m-none-eabi --no-default-features --features alloc,nightly
     cargo check --target thumbv6m-none-eabi --no-default-features --features nightly
-    cargo check --target thumbv6m-none-eabi --no-default-features --features alloc,nightly
 fi

crossbeam-epoch/Cargo.toml

@@ -19,7 +19,7 @@ categories = ["concurrency", "memory-management", "no-std"]
 default = ["std"]
 nightly = ["crossbeam-utils/nightly"]
 std = ["alloc", "crossbeam-utils/std", "lazy_static"]
-alloc = ["crossbeam-utils/alloc"]
+alloc = []
 sanitize = [] # Makes it more likely to trigger any potential data races.
 
 [dependencies]

crossbeam-queue/Cargo.toml

@@ -18,7 +18,7 @@ categories = ["concurrency", "data-structures"]
 [features]
 default = ["std"]
 std = ["alloc", "crossbeam-utils/std"]
-alloc = ["crossbeam-utils/alloc"]
+alloc = []
 nightly = []
 
 [dependencies]

crossbeam-skiplist/Cargo.toml

@@ -19,7 +19,7 @@ categories = ["algorithms", "concurrency", "data-structures", "no-std"]
 default = ["std"]
 nightly = ["crossbeam-epoch/nightly", "crossbeam-utils/nightly"]
 std = ["alloc", "crossbeam-epoch/std", "crossbeam-utils/std"]
-alloc = ["crossbeam-epoch/alloc", "crossbeam-utils/alloc"]
+alloc = ["crossbeam-epoch/alloc"]
 
 [dependencies]
 cfg-if = "0.1.2"

crossbeam-utils/Cargo.toml

@@ -18,8 +18,7 @@ categories = ["algorithms", "concurrency", "data-structures", "no-std"]
 [features]
 default = ["std"]
 nightly = []
-std = ["alloc", "lazy_static"]
-alloc = []
+std = ["lazy_static"]
 
 [dependencies]
 cfg-if = "0.1.2"

crossbeam-utils/src/lib.rs

@@ -33,8 +33,6 @@
 
 #[macro_use]
 extern crate cfg_if;
-#[cfg(feature = "alloc")]
-extern crate alloc;
 #[cfg(feature = "std")]
 extern crate core;