Get rid of the environment tag, that doesn't make sense in this case.

cloudformation_templates/edx-admin-reference-architecture.json

@@ -2,11 +2,6 @@
   "AWSTemplateFormatVersion":"2010-09-09",
   "Description":"Bring up a VPC for operations.",
   "Parameters":{
-    "EnvironmentTag":{
-      "Type":"String",
-      "Description":"A tag value applied to the hosts in the VPC indicating which environment to use during the configuration phase, e.g., stage, prod, sandbox",
-      "Default":"sandbox"
-    },
     "DeploymentTag":{
       "Type":"String",
       "Description":"A tag value applied to the hosts in the VPC indicating which deployment this is, e.g., edx, edge, <university>, <org>"
@@ -79,7 +74,7 @@
     "NATInstanceType":{
       "Description":"NAT Device EC2 instance type",
       "Type":"String",
-      "Default":"m1.small",
+      "Default":"t1.micro",
       "AllowedValues":[
         "t1.micro",
         "m1.small",
@@ -659,13 +654,6 @@
             "Value":"bastion"
           },
           {
-            "Key":"environment",
-            "Value":{
-              "Ref":"EnvironmentTag"
-            },
-            "PropagateAtLaunch":true
-          },
-          {
             "Key":"deployment",
             "Value":{
               "Ref":"DeploymentTag"
@@ -781,13 +769,6 @@
             "Value":"admin"
           },
           {
-            "Key":"environment",
-            "Value":{
-              "Ref":"EnvironmentTag"
-            },
-            "PropagateAtLaunch":true
-          },
-          {
             "Key":"deployment",
             "Value":{
               "Ref":"DeploymentTag"