readme: remove old CI badges

Also remove "supported platforms" section

README.md

@@ -2,9 +2,7 @@
 
 [![Crates.io Badge](https://img.shields.io/crates/v/capstone.svg)](https://crates.io/crates/capstone)
 
-Linux [![Github Workflow CI Badge](https://github.com/capstone-rust/capstone-rs/actions/workflows/main.yml/badge.svg)](https://github.com/capstone-rust/capstone-rs/actions)
-|
-Windows [![Appveyor CI Badge](https://ci.appveyor.com/api/projects/status/github/capstone-rust/capstone-rs?svg=true&branch=master)](https://ci.appveyor.com/project/tmfink/capstone-rs)
+Linux/macOS/Windows [![Github Workflow CI Badge](https://github.com/capstone-rust/capstone-rs/actions/workflows/main.yml/badge.svg)](https://github.com/capstone-rust/capstone-rs/actions)
 |
 FreeBSD [![Cirrus CI Badge](https://api.cirrus-ci.com/github/capstone-rust/capstone-rs.svg)](https://cirrus-ci.com/github/capstone-rust/capstone-rs)
 

capstone-sys/README.md

@@ -5,8 +5,6 @@ Low-level, unsafe Rust bindings for the [`Capstone`][capstone] disassembly libra
 [capstone]: https://github.com/aquynh/capstone
 
 [![Crates.io Badge](https://img.shields.io/crates/v/capstone-sys.svg)](https://crates.io/crates/capstone-sys)
-[![Travis CI Badge](https://travis-ci.org/capstone-rust/capstone-sys.svg?branch=master)](https://travis-ci.org/capstone-rust/capstone-sys)
-[![Appveyor CI Badge](https://ci.appveyor.com/api/projects/status/github/capstone-rust/capstone-sys?svg=true&branch=master)](https://ci.appveyor.com/project/tmfink/capstone-sys)
 
 **[API Documentation](https://docs.rs/capstone-sys/)**
 
@@ -18,26 +16,10 @@ Instead, consider using [capstone-rs](https://github.com/capstone-rust/capstone-
 
 ## Requirements
 
-* Rust version >= 1.50.0
+* Minimum Rust Version: `1.70.0`
 * A toolchain capable of compiling Capstone
     - We build the bundled Capstone with the [`cc` crate](https://github.com/alexcrichton/cc-rs)
 
-[Rust unions]: https://doc.rust-lang.org/stable/reference/items/unions.html
-
-### Supported Platforms
-
-| Platform                   | Supported |
-| -------------------------- | -- |
-| `x86_64-apple-darwin`      | X  |
-| `i686-apple-darwin`        | X  |
-| `x86_64-pc-windows-msvc`   | X  |
-| `x86_64-pc-windows-gnu`    | X  |
-| `i686-pc-windows-msvc`     | X  |
-| `i686-pc-windows-gnu`      | X  |
-| `x86_64-unknown-linux-gnu` | X  |
-| `i686-unknown-linux-gnu`   | X  |
-| `x86_64-unknown-freebsd`   | X  |
-
 ## Features
 
 You can specify the following [features](https://doc.rust-lang.org/cargo/reference/manifest.html#the-features-section) in `Cargo.toml`: