Remove Linux-specific deps from web build

The Alsa and Udev system dependencies are only required on Linux. The
WASM/WASI build doesn't use them, so they don't need to exist in the
build container.

Dockerfile

@@ -1,7 +1,5 @@
 FROM rust:1.89 AS builder
 
-RUN apt-get update
-RUN apt-get install -y --no-install-recommends libasound2-dev libudev-dev
 RUN rustup target add wasm32-unknown-unknown
 RUN cargo install --locked wasm-bindgen-cli