Merge pull request #977 from puppetlabs/pdksync_maint/main/deprecate_sles11

pdksync - (MAINT) Remove SLES 11 support

Author: pmcmaw

metadata.json

@@ -47,7 +47,6 @@
     {
       "operatingsystem": "SLES",
       "operatingsystemrelease": [
-        "11 SP1",
         "12",
         "15"
       ]