Minimal musllinux_1_1 build due to sporadic CI failure

musllinux_1_2 was added something like two years ago
and should probably be used instead.

Author: ijl

.github/workflows/linux.yaml

@@ -140,14 +140,14 @@ jobs:
         CC: "gcc"
         CFLAGS: "-O2"
         LDFLAGS: "-O2 -flto -Wl,--as-needed"
-        RUSTFLAGS: "-C target-feature=-crt-static -Z mir-opt-level=4"
+        RUSTFLAGS: "-C target-feature=-crt-static"
         CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
       with:
         rust-toolchain: nightly-2024-01-17
         rustup-components: rust-src
         target: ${{ matrix.platform.target }}
         manylinux: musllinux_1_1
-        args: --release --strip --out=dist --features=encoding_rs/simd-accel,no-panic,unstable-simd,yyjson -i python${{ matrix.python.version }}
+        args: --release --strip --out=dist --features=no-panic,yyjson -i python${{ matrix.python.version }}
 
     - name: Set up QEMU
       if: matrix.platform.arch != 'x86_64'