Delete `Prometheus` static target file.

cookbooks/prometheus/files/etc/prometheus.d/targets/targets.yml

@@ -1,2 +0,0 @@
-- targets:
-  - localhost:9100

cookbooks/prometheus/prometheus_setup.rb

@@ -1,5 +1,5 @@
 # Create `/etc/prometheus.d/`:
-%w(/etc/prometheus.d /etc/prometheus.d/targets/).each do |d|
+%w(/etc/prometheus.d).each do |d|
   directory d do
     owner  'root'
     group  'root'
@@ -14,13 +14,6 @@ remote_file '/etc/prometheus.d/prometheus.yml' do
   mode   '644'
 end
 
-# Deploy temporary file for `prometheus` targets:
-remote_file '/etc/prometheus.d/targets/targets.yml' do
-  owner  'root'
-  group  'root'
-  mode   '644'
-end
-
 # Deploy `supervisor` configuration for `prometheus`:
 remote_file '/etc/supervisor/conf.d/prometheus.conf' do
   owner  'root'