Revert "Update to PyQt 5.10"

This reverts commit a701426703.

.travis.yml

@@ -17,12 +17,10 @@ matrix:
     - os: linux
       env: TESTENV=py36-pyqt58
     - os: linux
+      python: 3.5
       env: TESTENV=py35-pyqt59
     - os: linux
-      python: 3.5
-      env: TESTENV=py35-pyqt510
-    - os: linux
-      env: TESTENV=py36-pyqt510-cov
+      env: TESTENV=py36-pyqt59-cov
     - os: osx
       env: TESTENV=py36 OSX=sierra
       osx_image: xcode9.2

misc/requirements/requirements-pyqt.txt

@@ -1,4 +1,4 @@
 # This file is automatically generated by scripts/dev/recompile_requirements.py
 
-PyQt5==5.10
-sip==4.19.7
+PyQt5==5.9.2
+sip==4.19.6

tox.ini

@@ -13,8 +13,8 @@ skipsdist = true
 setenv =
     QT_QPA_PLATFORM_PLUGIN_PATH={envdir}/Lib/site-packages/PyQt5/plugins/platforms
     PYTEST_QT_API=pyqt5
-    pyqt{,56,571,58,59,510}: LINK_PYQT_SKIP=true
-    pyqt{,56,571,58,59,510}: QUTE_BDD_WEBENGINE=true
+    pyqt{,56,571,58,59}: LINK_PYQT_SKIP=true
+    pyqt{,56,571,58,59}: QUTE_BDD_WEBENGINE=true
     cov: PYTEST_ADDOPTS=--cov --cov-report xml --cov-report=html --cov-report=
 passenv = PYTHON DISPLAY XAUTHORITY HOME USERNAME USER CI TRAVIS XDG_* QUTE_* DOCKER
 basepython =
@@ -27,7 +27,6 @@ deps =
     pyqt571: PyQt5==5.7.1
     pyqt58: PyQt5==5.8.2
     pyqt59: PyQt5==5.9.2
-    pyqt510: PyQt5==5.10
 commands =
     {envpython} scripts/link_pyqt.py --tox {envdir}
     {envpython} -bb -m pytest {posargs:tests}