Remove deprecated crypto_common re-exports

It was re-exported as `common` from `aead`, `cipher`, and
`universal-hash` in #2237, with the old name re-exported and
"deprecated".

Unfortuntaely, those deprecations don't work as expected, e.g.

    #![allow(unused_imports)]
    use digest::core_api::EagerHash;
    use digest::crypto_common::OutputSizeUser;

This compiles without warnings:

   Compiling crypto-common v0.2.0-rc.15
   Compiling digest v0.11.0-rc.10
   Compiling foobar v0.1.0 (/private/tmp/foobar)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 2.05s

Even if we change the re-export to use a deprecated module, ala:

    #[deprecated(...)
    pub mod crypto_common {
        pub use ::common::*;
    }

...that still doesn't work. Unfortunately deprecations only seem to
apply to the individual items, and not their imports or the modules
they're imported through.

Author: tarcieri

Cargo.lock

@@ -50,6 +50,3 @@ pub use common::{
     typenum::{self, consts},
 };
 pub use inout::{InOut, InOutBuf};
-
-#[deprecated(since = "0.5.0", note = "use `cipher::common` instead")]
-pub use common as crypto_common;

cipher/src/lib.rs

@@ -73,16 +73,6 @@ pub use common::{Output, OutputSizeUser, Reset, array, typenum, typenum::consts}
 pub use mac::{CtOutput, Mac, MacError, MacMarker};
 pub use xof_fixed::XofFixedWrapper;
 
-#[cfg(feature = "block-api")]
-#[deprecated(
-    since = "0.11.0",
-    note = "`digest::core_api` has been replaced by `digest::block_api`"
-)]
-pub use block_api as core_api;
-
-#[deprecated(since = "0.11.0", note = "use `digest::common` instead")]
-pub use common as crypto_common;
-
 use common::typenum::Unsigned;
 use core::fmt;
 

digest/src/lib.rs

@@ -13,9 +13,6 @@ pub use common::{
     typenum::{self, consts},
 };
 
-#[deprecated(since = "0.6.0", note = "use `universal_hash::common` instead")]
-pub use common as crypto_common;
-
 use common::{BlockSizeUser, BlockSizes, ParBlocksSizeUser, array::Array};
 use core::slice;
 use subtle::ConstantTimeEq;