remove more platform

Signed-off-by: Brian L. Troutwine <brian.troutwine@datadoghq.com>

Dockerfile

@@ -1,5 +1,5 @@
 # Update the rust version in-sync with the version in rust-toolchain.toml
-FROM --platform=$BUILDPLATFORM docker.io/rust:1.81.0-bullseye AS builder
+FROM docker.io/rust:1.81.0-bullseye AS builder
 
 RUN apt-get update && apt-get install -y \
     protobuf-compiler fuse3 libfuse3-dev \
@@ -9,7 +9,7 @@ WORKDIR /app
 COPY . /app
 RUN cargo build --release --locked --bin lading
 
-FROM --platform=$BUILDPLATFORM  docker.io/debian:bullseye-20240701-slim
+FROM docker.io/debian:bullseye-20240701-slim
 RUN apt-get update && apt-get install -y libfuse3-dev=3.10.3-2 fuse3=3.10.3-2 && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /app/target/release/lading /usr/bin/lading