Removing future from travis and dockerfile

.travis.yml

@@ -14,7 +14,6 @@ install:
 - ./install_ta-lib.sh
 - export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
 - pip install --upgrade flake8 coveralls pytest-random-order pytest-asyncio mypy
-- pip install future
 - pip install -r requirements.txt
 - pip install -e .
 jobs:

Dockerfile

@@ -17,7 +17,6 @@ WORKDIR /freqtrade
 # Install dependencies
 COPY requirements.txt /freqtrade/
 RUN pip install numpy --no-cache-dir \
-  && pip install future \
   && pip install -r requirements.txt --no-cache-dir
 
 # Install and execute