Disable Hadolint check for consecutive RUN instructions (DL3059)

This check doesn't seem to add enough value to justify the difficulties it
tends to create when generating `RUN` instructions from a template.

docker/amd64/Dockerfile.alpine

@@ -75,7 +75,6 @@ RUN touch src/main.rs
 
 # Builds again, this time it'll just be
 # your actual source files being built
-# hadolint ignore=DL3059
 RUN cargo build --features ${DB} --release --target=x86_64-unknown-linux-musl
 
 ######################## RUNTIME IMAGE  ########################