Remove protobuf dependency.

Dockerfile

@@ -7,14 +7,6 @@ ENV LANG=C.UTF-8 \
 RUN apt-get update; \
     apt-get install -y wget python3-pip gnupg unzip make g++ autoconf automake libtool pkg-config gosu tzdata;
 
-# Must install protoc directly as latest package is only on 3.12
-RUN wget -O protobuf_src.tar.gz https://github.com/protocolbuffers/protobuf/releases/download/v21.1/protobuf-python-4.21.1.tar.gz && \
-    tar xvf protobuf_src.tar.gz && \
-    cd protobuf-3.21.1 && \
-    ./configure --prefix=/usr && \
-    make -j$(nproc) install && \
-    ldconfig
-
 ARG COINCURVE_VERSION=v0.2
 RUN wget -O coincurve-anonswap.zip https://github.com/tecnovert/coincurve/archive/refs/tags/anonswap_$COINCURVE_VERSION.zip && \
     unzip coincurve-anonswap.zip && \
@@ -28,7 +20,6 @@ RUN pip3 install -r requirements.txt
 
 COPY . basicswap-master
 RUN cd basicswap-master; \
-    protoc -I=basicswap --python_out=basicswap basicswap/messages.proto; \
     pip3 install .;
 
 RUN useradd -ms /bin/bash swap_user && \