Remove messed up bridges subtree

polkadot/bridges/deployments/BridgeDeps.Dockerfile

@@ -1,32 +0,0 @@
-# Image with dependencies required to build projects from the bridge repo.
-#
-# This image is meant to be used as a building block when building images for
-# the various components in the bridge repo, such as nodes and relayers.
-FROM ubuntu:xenial
-
-ENV LAST_DEPS_UPDATE 2020-12-21
-
-RUN set -eux; \
-	apt-get update && \
-	apt-get install -y curl ca-certificates && \
-	apt-get install -y cmake pkg-config libssl-dev git clang libclang-dev
-
-ENV LAST_CERTS_UPDATE 2020-12-21
-
-RUN update-ca-certificates && \
-	curl https://sh.rustup.rs -sSf | sh -s -- -y
-
-ENV PATH="/root/.cargo/bin:${PATH}"
-ENV LAST_RUST_UPDATE 2020-12-21
-
-RUN rustup update stable && \
-	rustup install nightly && \
-	rustup target add wasm32-unknown-unknown --toolchain nightly
-
-RUN rustc -vV && \
-    cargo -V && \
-    gcc -v && \
-    g++ -v && \
-    cmake --version
-
-ENV RUST_BACKTRACE 1