aarch64-unknown-linux-musl: do not set RUSTFLAGS

Author: jonas-schievink

docker/Dockerfile.aarch64-unknown-linux-musl

@@ -21,9 +21,6 @@ RUN ln -sf \
     /usr/local/aarch64-linux-musl/lib/ld-musl-aarch64.so.1
 ENV QEMU_LD_PREFIX=/usr/local/aarch64-linux-musl
 
-# Workaround for https://github.com/rust-lang/rust/issues/46651
-ENV RUSTFLAGS="-C link-arg=-lgcc"
-
 ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=aarch64-linux-musl-gcc \
     CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUNNER=qemu-aarch64 \
     CC_aarch64_unknown_linux_musl=aarch64-linux-musl-gcc \