drop sensitive from variables.tf for 0.13 compatibility (?)

Author: tmladek

examples/collector/variables.tf

@@ -11,15 +11,13 @@ EOF
 variable "db_password" {
   description = "Database password for collector monitoring"
   type        = string
-  sensitive   = true
   # Default for e2e testing — the database host is not real, so the password is not used.
   default = "e2e_test_password"
 }
 
 variable "proxy_password" {
   description = "Password for HTTP Basic Auth on proxy collector"
   type        = string
-  sensitive   = true
   # Default for e2e testing — the proxy collector is destroyed after each run.
   default = "e2e_test_proxy_password"
 }