Avoid double inclusion of requirements.txt

Signed-off-by: Michal Čihař <michal@cihar.com>

.travis.yml

@@ -24,7 +24,7 @@ before_install:
 install:
   - timestamp.sh install
   - pip install $DJANGO_PIP
-  - pip install -r requirements.txt -r requirements-optional.txt -r travis/requirements.txt -r travis/requirements-${TRAVIS_DATABASE:-sqlite}.txt -r ${BUILD_TREND_HOME}/requirements.txt
+  - pip install -r requirements-optional.txt -r travis/requirements.txt -r travis/requirements-${TRAVIS_DATABASE:-sqlite}.txt -r ${BUILD_TREND_HOME}/requirements.txt
 # create databases
 before_script:
   - timestamp.sh before_script

shippable.yml

@@ -19,7 +19,7 @@ env:
 # commands to install dependencies
 install:
   - pip install $DJANGO_PIP
-  - pip install -r requirements.txt -r requirements-optional.txt -r travis/requirements.txt -r travis/requirements-${TRAVIS_DATABASE:-sqlite}.txt
+  - pip install -r requirements-optional.txt -r travis/requirements.txt -r travis/requirements-${TRAVIS_DATABASE:-sqlite}.txt
 # create databases
 before_script:
   - mysql -e 'DROP DATABASE IF EXISTS weblate;'