Remove deprecated feature flags and bump major version.

The major version bump is probably very cautious but we may break
things for consumers with the removal of feature flags and we now require
a newer rust version.

AUTHORS

@@ -3,3 +3,4 @@ Bence Meszaros <bence.me@gmail.com>
 Rafal Mielniczuk <rafalm3@gmail.com>
 Stefan Lankes <slankes@eonerc.rwth-aachen.de>
 Mingshen Sun <bob@mssun.me>
+Niklas Fiekas <niklas.fiekas@backscattering.de>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "raw-cpuid"
-version = "8.1.2"
+version = "9"
 authors = ["Gerd Zellweger <mail@gerdzellweger.com>"]
 edition = "2018"
 
@@ -13,14 +13,13 @@ readme = "README.md"
 keywords = ["cpuid", "x86", "amd64", "os", "libcore"]
 license = "MIT"
 exclude = ["/ci"]
+rust = "1.26"
 
 [[bin]]
 name = "cpuid"
 path = "src/bin/cpuid.rs"
 
 [features]
-use_arch = []
-nightly = []
 serialize = ["serde", "serde_derive"]
 
 [dependencies]