Remove Dockerfile.aarch64

it's identical to the real image except for the "--platform" tag,
which is unnecessary if building from a arm64 architecture

docker/Dockerfile.aarch64

@@ -1,58 +0,0 @@
-FROM --platform=linux/arm64/v8 python:3.9.4-slim-buster as base
-
-# Setup env
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
-ENV PYTHONDONTWRITEBYTECODE 1
-ENV PYTHONFAULTHANDLER 1
-ENV PATH=/home/ftuser/.local/bin:$PATH
-ENV FT_APP_ENV="docker"
-
-# Prepare environment
-RUN mkdir /freqtrade \
-  && apt-get update \
-  && apt-get -y install sudo libatlas3-base curl sqlite3 libhdf5-serial-dev  \
-  && apt-get clean \
-  && useradd -u 1000 -G sudo -U -m ftuser \
-  && chown ftuser:ftuser /freqtrade \
-  # Allow sudoers
-  && echo "ftuser ALL=(ALL) NOPASSWD: /bin/chown" >> /etc/sudoers
-
-WORKDIR /freqtrade
-
-# Install dependencies
-FROM base as python-deps
-RUN  apt-get update \
-  && apt-get -y install build-essential libssl-dev git libffi-dev libgfortran5 pkg-config cmake gcc \
-  && apt-get clean \
-  && pip install --upgrade pip
-
-# Install TA-lib
-COPY build_helpers/* /tmp/
-RUN cd /tmp && /tmp/install_ta-lib.sh && rm -r /tmp/*ta-lib*
-ENV LD_LIBRARY_PATH /usr/local/lib
-
-# Install dependencies
-COPY --chown=ftuser:ftuser requirements.txt requirements-hyperopt.txt /freqtrade/
-USER ftuser
-RUN  pip install --user --no-cache-dir numpy \
-  && pip install --user --no-cache-dir -r requirements-hyperopt.txt
-
-# Copy dependencies to runtime-image
-FROM base as runtime-image
-COPY --from=python-deps /usr/local/lib /usr/local/lib
-ENV LD_LIBRARY_PATH /usr/local/lib
-
-COPY --from=python-deps --chown=ftuser:ftuser /home/ftuser/.local /home/ftuser/.local
-
-USER ftuser
-# Install and execute
-COPY --chown=ftuser:ftuser . /freqtrade/
-
-RUN pip install -e . --user --no-cache-dir --no-build-isolation\
-  && mkdir /freqtrade/user_data/ \
-  && freqtrade install-ui
-
-ENTRYPOINT ["freqtrade"]
-# Default to trade mode
-CMD [ "trade" ]

docs/docker_quickstart.md

@@ -98,7 +98,7 @@ Create a new directory and place the [docker-compose file](https://raw.githubuse
         image: freqtradeorg/freqtrade:custom_arm64
         build:
           context: .
-          dockerfile: "./docker/Dockerfile.aarch64"
+          dockerfile: "Dockerfile"
         ```
 
 The above snippet creates a new directory called `ft_userdata`, downloads the latest compose file and pulls the freqtrade image.