Remove the AllowedPattern from the instance types list

Author: keithduncan

templates/aws-stack.yml

@@ -234,7 +234,8 @@ Parameters:
     Type: CommaDelimitedList
     Default: t3.large
     MinLength: 1
-    AllowedPattern: "^[\\w\\.]+(,[\\w\\.]*){0,3}$"
+    # AllowedPattern not allowed on a CommaDelimitedList :(
+    # AllowedPattern: "^[\\w\\.]+(,[\\w\\.]*){0,3}$"
     ConstraintDescription: "must contain 1-4 instance types separated by commas. No space before/after the comma."
 
   InstanceTypes: