Drop extraneous builds for testing

Author: gfyoung

.travis.yml

@@ -1,3 +1,6 @@
+notifications:
+  email: false
+
 sudo: false
 language: python
 # Default Python version is usually 2.7
@@ -32,51 +35,9 @@ matrix:
       - python: 3.5
 
     include:
-    - dist: trusty
-      env:
-        - JOB="3.7" ENV_FILE="ci/travis-37.yaml" TEST_ARGS="--skip-slow --skip-network"
-
-    - dist: trusty
-      env:
-        - JOB="2.7, locale, slow, old NumPy" ENV_FILE="ci/travis-27-locale.yaml" LOCALE_OVERRIDE="zh_CN.UTF-8" SLOW=true
-      addons:
-        apt:
-          packages:
-          - language-pack-zh-hans
-    - dist: trusty
-      env:
-        - JOB="2.7" ENV_FILE="ci/travis-27.yaml" TEST_ARGS="--skip-slow"
-      addons:
-        apt:
-          packages:
-          - python-gtk2
-    - dist: trusty
-      env:
-        - JOB="3.6, lint, coverage" ENV_FILE="ci/travis-36.yaml" TEST_ARGS="--skip-slow --skip-network" PANDAS_TESTING_MODE="deprecate" COVERAGE=true LINT=true
-    - dist: trusty
-      env:
-        - JOB="3.7, NumPy dev" ENV_FILE="ci/travis-37-numpydev.yaml" TEST_ARGS="--skip-slow --skip-network -W error" PANDAS_TESTING_MODE="deprecate"
-      addons:
-        apt:
-          packages:
-          - xsel
-
-    # In allow_failures
-    - dist: trusty
-      env:
-        - JOB="3.6, slow" ENV_FILE="ci/travis-36-slow.yaml" SLOW=true
-
-    # In allow_failures
     - dist: trusty
       env:
         - JOB="3.6, doc" ENV_FILE="ci/travis-36-doc.yaml" DOC=true
-    allow_failures:
-      - dist: trusty
-        env:
-          - JOB="3.6, slow" ENV_FILE="ci/travis-36-slow.yaml" SLOW=true
-      - dist: trusty
-        env:
-          - JOB="3.6, doc" ENV_FILE="ci/travis-36-doc.yaml" DOC=true
 
 before_install:
   - echo "before_install"