Reduce required Python libraries and simplify Travis setup

.travis.yml

@@ -1,54 +1,27 @@
 dist: xenial
-
 language: python
 
 matrix:
   include:
-  - name: "Python 3.6 Unit Test"
-    python: 3.6
-    env: PYTHON_VERSION=3.6 NAME="UNIT"
   - name: "Python 3.6 Lint"
     python: 3.6
     env: PYTHON_VERSION=3.6 NAME="LINT"
-
-addons:
-  apt:
-    packages:
-      - docker-ce
-
-before_install:
-  - docker pull conda/miniconda3
-  - docker --version
+  - name: "Python 3.6 Unit Test"
+    python: 3.6
+    env: PYTHON_VERSION=3.6 NAME="UNIT"
 
 install:
-  # Build docker image
-  - . ./scripts/container.sh --build
-
-  # Print conda details
-  - docker run --rm symbolic-pymc:latest bash -c "conda info -a"
-
-  # Print conda environment details
-  - docker run --rm symbolic-pymc:latest bash -c "conda list && pip freeze"
-
-  # Install packages needed for service integration
-  - if [[ $NAME == UNIT ]]; then pip install coveralls ; fi
-  - if [[ $NAME == LINT ]]; then pip install coveralls ; fi
+  - pip install -r requirements.txt
+  - pip install -r requirements-dev.txt
+  - if [[ $NAME == UNIT ]]; then pip install coveralls; fi
+  - pip freeze
 
 script:
-
-  # Tests command is default in dockerfile cmd
-  - if [[ $NAME == UNIT ]]; then docker run  --mount type=bind,source="$(pwd)",target=/opt/symbolic-pymc --name symbolic_pymc_test symbolic-pymc:latest bash -c \
-                                              "pytest -v tests/ --cov=symbolic_pymc/";
-    fi
-
-  - if [[ $NAME == LINT ]]; then docker run symbolic-pymc:latest bash -c "make lint";
-    fi
+  - if [[ $NAME == UNIT ]]; then pytest -v tests/ --cov=symbolic_pymc/; fi
+  - if [[ $NAME == LINT ]]; then make lint; fi
 
 after_success:
   - echo $(pwd)
   - ls -la
   - if [[ $NAME == UNIT ]]; then sed -i 's/\/opt\/symbolic-pymc/\/home\/travis\/build\/pymc-devs\/symbolic-pymc/g' .coverage; fi
   - if [[ $NAME == UNIT ]]; then coveralls; fi
-
-  - if [[ $NAME == LINT ]]; then sed -i 's/\/opt\/symbolic-pymc/\/home\/travis\/build\/pymc-devs\/symbolic-pymc/g' .coverage; fi
-  - if [[ $NAME == LINT ]]; then coveralls; fi

requirements.txt

@@ -1,12 +1,11 @@
+scipy>=1.2.0
 Theano>=1.0.4
-pymc3>=3.6
-tf-estimator-nightly>=1.14.0.dev2019021101
-tf-nightly>=1.14.1.dev20190320
+tf-nightly-2.0-preview>=2.0.0.dev20190526
 tfp-nightly>=0.7.0.dev20190320
+pymc3>=3.6
 pymc4 @ git+https://github.com/pymc-devs/pymc4.git@master#egg=pymc4-0.0.1
 multipledispatch>=0.6.0
 unification>=0.2.2
 kanren @ git+https://github.com/pymc-devs/kanren.git@symbolic-pymc#egg=kanren-0.2.3
 toolz>=0.9.0
 sympy>=1.3
-scipy>=1.2.0