build-openmp.sh: Use llvm-ml instead of uasm

Dockerfile

@@ -44,16 +44,6 @@ ARG TOOLCHAIN_ARCHS="i686 x86_64 armv7 aarch64"
 
 ARG DEFAULT_CRT=ucrt
 
-# Build UASM, for building openmp. In the future, llvm-ml should be able
-# to handle it, but it doesn't yet.
-RUN git clone https://github.com/Terraspace/UASM && \
-    cd UASM && \
-    git checkout 16a853bd6de807fe2c42569f8375a029684c0f22 && \
-    make -f gccLinux64.mak -j$(nproc) && \
-    mkdir -p $TOOLCHAIN_PREFIX/bin && \
-    cp GccUnixR/uasm $TOOLCHAIN_PREFIX/bin
-COPY wrappers/uasm-wrapper.sh $TOOLCHAIN_PREFIX/bin
-
 # Build everything that uses the llvm monorepo. We need to build the mingw runtime before the compiler-rt/libunwind/libcxxabi/libcxx runtimes.
 COPY build-llvm.sh strip-llvm.sh install-wrappers.sh build-mingw-w64.sh build-mingw-w64-tools.sh build-compiler-rt.sh build-mingw-w64-libraries.sh build-libcxx.sh build-openmp.sh ./
 COPY wrappers/*.sh wrappers/*.c wrappers/*.h ./wrappers/