py3: get rid of py2 on CI scripts

scripts/ci/before_install.sh

@@ -44,16 +44,9 @@ if [[ "$TRAVIS_BUILD_STAGE_NAME" == "Test" ]]; then
 fi
 
 if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-    if [[ -n "$PY2" ]]; then
-        $scriptdir/retry.sh choco install python2
-        echo 'PATH="/c/Python27:/c/Python27/Scripts:$PATH"' >> env.sh
-    else
-        $scriptdir/retry.sh choco install python --version 3.7.5
-        echo 'PATH="/c/Python37:/c/Python37/Scripts:$PATH"' >> env.sh
-    fi
+    $scriptdir/retry.sh choco install python --version 3.7.5
+    echo 'PATH="/c/Python37:/c/Python37/Scripts:$PATH"' >> env.sh
 elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-    if [[ ! -n "$PY2" ]]; then
-        ln -s -f /usr/local/bin/python3 /usr/local/bin/python
-        ln -s -f /usr/local/bin/pip3 /usr/local/bin/pip
-    fi
+    ln -s -f /usr/local/bin/python3 /usr/local/bin/python
+    ln -s -f /usr/local/bin/pip3 /usr/local/bin/pip
 fi

scripts/ci/check_python.sh

@@ -12,12 +12,7 @@ else
 fi
 
 py_ver="$(python -c 'import sys; print(sys.version[0])')"
-if [[ -n "$PY2" ]]; then
-    if [[ "$py_ver" != "2" ]]; then
-        exit 1
-    fi
-else
-    if [[ "$py_ver" != "3" ]]; then
-        exit 1
-    fi
+
+if [[ "$py_ver" != 3 ]]; then
+  exit 1
 fi

scripts/ci/deploy_condition.sh

@@ -2,13 +2,6 @@
 
 set -e
 
-python_ver="$(python -c 'import sys; print(sys.version_info[0])')"
-
-if [[ $python_ver != "2" ]]; then
-    echo false
-    exit 0
-fi
-
 if [[ $TRAVIS_OS_NAME == "osx" && $TRAVIS_OSX_IMAGE != "xcode8.3" ]]; then
     echo false
     exit 0

scripts/ci/script.sh

@@ -6,8 +6,7 @@ set -e
 python -mtests
 
 if [[ "$TRAVIS_PULL_REQUEST" == "false" && \
-      "$TRAVIS_SECURE_ENV_VARS" == "true" && \
-      "$(python -c 'import sys; print(sys.version_info[0])')" == '2' ]]; then
+      "$TRAVIS_SECURE_ENV_VARS" == "true" ]]; then
 	pip install codecov
 	codecov
 fi