Auto merge of #66908 - Centril:rollup-26givp6, r=Centril

Rollup of 9 pull requests

Successful merges:

 - #66612 (Initial implementation of or-pattern usefulness checking)
 - #66705 (Atomic as_mut_ptr)
 - #66759 (impl TrustedLen for vec::Drain)
 - #66858 (Use LLVMAddAnalysisPasses instead of Rust's wrapper)
 - #66870 (SimplifyArmIdentity only for locals with the same type)
 - #66883 (rustc_typeck: gate AnonConst's generics on feature(const_generics).)
 - #66889 (Make python-generated source files compatible with rustfmt)
 - #66894 (Remove unneeded prelude imports in libcore tests)
 - #66895 (Feature gating *declarations* => new crate `rustc_feature`)

Failed merges:

 - #66905 (rustc_plugin: Remove some remaining plugin features)

r? @ghost

3 files changed, 0 insertions, 3 deletions

diff --git a/src/libcore/tests/num/bignum.rs b/src/libcore/tests/num/bignum.rs
index b9e15ec5c07..50a3ec046ad 100644
--- a/src/libcore/tests/num/bignum.rs
+++ b/src/libcore/tests/num/bignum.rs
@@ -1,4 +1,3 @@
-use std::prelude::v1::*;
 use core::num::bignum::tests::Big8x3 as Big;
 
 #[test]
diff --git a/src/libcore/tests/num/flt2dec/mod.rs b/src/libcore/tests/num/flt2dec/mod.rs
index a35897e9bc1..f85369ce40b 100644
--- a/src/libcore/tests/num/flt2dec/mod.rs
+++ b/src/libcore/tests/num/flt2dec/mod.rs
@@ -1,4 +1,3 @@
-use std::prelude::v1::*;
 use std::{str, i16, f32, f64, fmt};
 
 use core::num::flt2dec::{decode, DecodableFloat, FullDecoded, Decoded};
diff --git a/src/libcore/tests/num/flt2dec/strategy/dragon.rs b/src/libcore/tests/num/flt2dec/strategy/dragon.rs
index dc4d78bfae1..0c545b4d887 100644
--- a/src/libcore/tests/num/flt2dec/strategy/dragon.rs
+++ b/src/libcore/tests/num/flt2dec/strategy/dragon.rs
@@ -1,4 +1,3 @@
-use std::prelude::v1::*;
 use super::super::*;
 use core::num::bignum::Big32x40 as Big;
 use core::num::flt2dec::strategy::dragon::*;