Remove all remnants of the collections feature.

src/lib.rs

@@ -1,5 +1,4 @@
 #![cfg_attr(feature = "alloc", feature(alloc))]
-#![cfg_attr(feature = "collections", feature(collections))]
 #![no_std]
 
 //! The _smoltcp_ library is built in a layered structure, with the layers corresponding
@@ -77,9 +76,6 @@ extern crate std;
 extern crate libc;
 #[cfg(feature = "alloc")]
 extern crate alloc;
-#[allow(deprecated)]
-#[cfg(feature = "collections")]
-extern crate collections;
 #[cfg(any(test, feature = "log"))]
 #[macro_use(log, log_enabled, trace, debug)]
 extern crate log;

src/phy/loopback.rs

@@ -8,8 +8,8 @@ use alloc::rc::Rc;
 use std::vec::Vec;
 #[cfg(feature = "std")]
 use std::collections::VecDeque;
-#[cfg(feature = "collections")]
-use collections::{Vec, VecDeque};
+#[cfg(feature = "alloc")]
+use alloc::{Vec, VecDeque};
 
 use {Error, Result};
 use super::{Device, DeviceLimits};

src/phy/mod.rs

@@ -112,7 +112,7 @@ mod sys;
 mod tracer;
 mod fault_injector;
 mod pcap_writer;
-#[cfg(any(feature = "std", feature = "collections"))]
+#[cfg(any(feature = "std", feature = "alloc"))]
 mod loopback;
 #[cfg(feature = "raw_socket")]
 mod raw_socket;
@@ -125,7 +125,7 @@ pub use self::sys::wait;
 pub use self::tracer::Tracer;
 pub use self::fault_injector::FaultInjector;
 pub use self::pcap_writer::{PcapLinkType, PcapMode, PcapSink, PcapWriter};
-#[cfg(any(feature = "std", feature = "collections"))]
+#[cfg(any(feature = "std", feature = "alloc"))]
 pub use self::loopback::Loopback;
 #[cfg(any(feature = "raw_socket"))]
 pub use self::raw_socket::RawSocket;

src/socket/set.rs

@@ -61,7 +61,7 @@ impl<'a, 'b: 'a, 'c: 'a + 'b> Set<'a, 'b, 'c> {
             ManagedSlice::Borrowed(_) => {
                 panic!("adding a socket to a full SocketSet")
             }
-            #[cfg(any(feature = "std", feature = "collections"))]
+            #[cfg(any(feature = "std", feature = "alloc"))]
             ManagedSlice::Owned(ref mut sockets) => {
                 sockets.push(None);
                 let index = sockets.len() - 1;

src/storage/mod.rs

@@ -2,7 +2,7 @@
 //!
 //! The `storage` module provides containers for use in other modules.
 //! The containers support both pre-allocated memory, without the `std`
-//! and `collections` crates being available, and heap-allocated memory.
+//! or `alloc` crates being available, and heap-allocated memory.
 
 mod assembler;
 mod ring_buffer;