Remove unnecessary vars from dev file

Author: JuttonS

infrastructure/dev.tfvars

@@ -16,5 +16,4 @@ mesh_client_key_ssm_param_name  = "/repo/dev/user-input/external/mesh-mailbox-cl
 mesh_ca_cert_ssm_param_name     = "/repo/dev/user-input/external/mesh-mailbox-ca-cert"
 
 standalone_vpc_tag                     = "ndr-dev"
-standalone_vpc_ig_tag                  = "ndr-dev"
-cloud_security_email_param_environment = "dev"
+standalone_vpc_ig_tag                  = "ndr-dev"