Remove EOL openSUSE Leap 42.2 from CI.

(cherry picked from commit abbc1ed4e6)

shippable.yml

@@ -29,7 +29,6 @@ matrix:
     - env: TEST=linux/fedora24/1
     - env: TEST=linux/fedora25/1
     - env: TEST=linux/ubuntu1204/1
-    - env: TEST=linux/opensuse42.2/1
     - env: TEST=linux/opensuse42.3/1
     - env: TEST=linux/ubuntu1404/1
     - env: TEST=linux/ubuntu1604/1
@@ -40,7 +39,6 @@ matrix:
     - env: TEST=linux/fedora24/2
     - env: TEST=linux/fedora25/2
     - env: TEST=linux/ubuntu1204/2
-    - env: TEST=linux/opensuse42.2/2
     - env: TEST=linux/opensuse42.3/2
     - env: TEST=linux/ubuntu1404/2
     - env: TEST=linux/ubuntu1604/2
@@ -50,7 +48,6 @@ matrix:
     - env: TEST=linux/centos7/3
     - env: TEST=linux/fedora24/3
     - env: TEST=linux/fedora25/3
-    - env: TEST=linux/opensuse42.2/3
     - env: TEST=linux/opensuse42.3/3
     - env: TEST=linux/ubuntu1204/3
     - env: TEST=linux/ubuntu1404/3