Remove C build tools for Python 3.12

The last project that depended on 312 wheels is multidict, and it seems like they finally released 312 wheels so we can remove gcc and libc6-dev as we don't need the c stdlib and gcc to compile the wheels

Author: No767

docker/Dockerfile

@@ -10,10 +10,7 @@ RUN apt-get update \
   tini \
   bash \
   netcat-traditional \
-  libffi-dev \
   git \
-  gcc \
-  libc6-dev \
   && apt-get clean
 
 WORKDIR /rodhaj
@@ -42,4 +39,4 @@ STOPSIGNAL SIGTERM
 LABEL org.opencontainers.image.title="Rodhaj"
 LABEL org.opencontainers.image.description="A discord modmail bot"
 LABEL org.opencontainers.image.licenses="Apache-2.0"
-LABEL org.opencontainers.image.source="https://github.com/transprogrammer/rodhaj"
+LABEL org.opencontainers.image.source="https://github.com/transprogrammer/rodhaj"