Remove clang from 24.04 (#499)

Author: bnbarham

swift-ci/main/ubuntu/24.04/Dockerfile

@@ -7,7 +7,6 @@ ENV DEBIAN_FRONTEND="noninteractive"
 
 RUN apt-get -y update && apt-get -y install \
   build-essential       \
-  clang                 \
   cmake                 \
   git                   \
   icu-devtools          \