RUBY-1971 Remove Community zSeries From 4.0 testing (#136)

Author: p-mongo

.evergreen/config.yml

@@ -493,12 +493,6 @@ axes:
   - id: "special-os"
     display_name: OS
     values:
-      - id: "rhel72-s390x"
-        display_name: "RHEL 7.2 Z-Series"
-        run_on: rhel72-zseries-test
-        variables:
-          MACHINE: "rhel72-s390x"
-      
       - id: "rhel71-ppc"
         display_name: "RHEL 7.1 PowerPC"
         run_on: rhel71-power8-test

.evergreen/functions.sh

@@ -17,9 +17,7 @@ host_arch() {
     fi
   elif test -f /etc/redhat-release; then
     # RHEL or CentOS
-    if test "`uname -m`" = s390x; then
-      arch=rhel72-s390x
-    elif test "`uname -m`" = ppc64le; then
+    if test "`uname -m`" = ppc64le; then
       arch=rhel71-ppc
     elif lsb_release -i |grep -q RedHat; then
       release=`lsb_release -r |awk '{print $2}' |tr -d .`