Only run codecov once.

Otherwise coverage diffs make no sense...

This reverts commit daaa15396c.

.appveyor.yml

@@ -1,3 +1,4 @@
+shallow_clone: true
 version: '{branch}-{build}'
 cache:
   - C:\projects\qutebrowser\.cache

.travis.yml

@@ -40,7 +40,7 @@ script:
   - tox -e $TESTENV -- -p no:sugar -v --cov-report term tests
 
 after_success:
-  - '[[ $TESTENV == py34 || $TESTENV == py35 ]] && codecov -e TESTENV -X gcov'
+  - '[[ ($TESTENV == py34 || $TESTENV == py35) && $TRAVIS_OX == linux ]] && codecov -e TESTENV -X gcov'
 
 matrix:
   exclude:

scripts/dev/ci_install.py

@@ -44,7 +44,7 @@ INSTALL_PYQT = TESTENV in ('py34', 'py35', 'unittests-nodisp', 'vulture',
                            'pylint')
 XVFB = TRAVIS_OS == 'linux' and TESTENV == 'py34'
 pip_packages = ['tox']
-if TESTENV in ['py34', 'py35']:
+if TESTENV in ['py34', 'py35'] and TRAVIS_OS == 'linux':
     pip_packages.append('codecov')