ci: remove musl check

It requires installing Zig and slows down CI.
This was not broken for a while and we can do
more frequent core releases to catch problems.

.github/workflows/ci.yml

@@ -39,10 +39,6 @@ jobs:
       - name: Check
         run: cargo check --workspace --all-targets --all-features
 
-      # Check with musl libc target which is used for `deltachat-rpc-server` releases.
-      - name: Check musl
-        run: scripts/zig-musl-check.sh
-
   cargo_deny:
     name: cargo deny
     runs-on: ubuntu-latest

scripts/zig-musl-check.sh

@@ -1,28 +0,0 @@
-#!/bin/sh
-#
-# Run `cargo check` with musl libc.
-# This requires `zig` to compile vendored openssl.
-
-set -x
-set -e
-
-unset RUSTFLAGS
-
-# Pin Rust version to avoid uncontrolled changes in the compiler and linker flags.
-export RUSTUP_TOOLCHAIN=1.72.0
-
-ZIG_VERSION=0.11.0
-
-# Download Zig
-rm -fr "$ZIG_VERSION" "zig-linux-x86_64-$ZIG_VERSION.tar.xz"
-wget "https://ziglang.org/builds/zig-linux-x86_64-$ZIG_VERSION.tar.xz"
-tar xf "zig-linux-x86_64-$ZIG_VERSION.tar.xz"
-export PATH="$PWD/zig-linux-x86_64-$ZIG_VERSION:$PATH"
-
-rustup target add x86_64-unknown-linux-musl
-CC="$PWD/scripts/zig-cc" \
-TARGET_CC="$PWD/scripts/zig-cc" \
-CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER="$PWD/scripts/zig-cc" \
-LD="$PWD/scripts/zig-cc" \
-ZIG_TARGET="x86_64-linux-musl" \
-cargo check --release --target x86_64-unknown-linux-musl -p deltachat_ffi --features jsonrpc