Remove Python 3.7 from CI build

The packages for 3.6 are universal because we don't depend on CPython
internals.

.travis.yml

@@ -34,7 +34,7 @@ matrix:
         - PLAT=i686
         - USE_CCACHE=1
         - FREETYPEPY_BUNDLE_FT=1
-    - os: linux  # Bundle 64 bit library for Python 3.6.
+    - os: linux  # Bundle 64 bit library.
       env:
         - MB_PYTHON_VERSION=3.6
         - USE_CCACHE=1
@@ -49,17 +49,6 @@ matrix:
         - MB_PYTHON_VERSION=3.6
         - USE_CCACHE=1
         - FREETYPEPY_BUNDLE_FT=1
-    - os: linux  # Bundle 64 bit library for Python 3.7.
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - USE_CCACHE=1
-        - FREETYPEPY_BUNDLE_FT=1
-    - os: osx
-      language: generic
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - USE_CCACHE=1
-        - FREETYPEPY_BUNDLE_FT=1
 
 before_install:
     - source ci/multibuild/common_utils.sh

appveyor.yml

@@ -15,10 +15,6 @@ environment:
       PYTHON_VERSION: 3.6
       PYTHON_ARCH: '64'
 
-    - PYTHON: C:\Python36-x64
-      PYTHON_VERSION: 3.7
-      PYTHON_ARCH: '64'
-
 init:
   - ECHO %PYTHON% %PYTHON_VERSION% %PYTHON_ARCH%