[Cleanup] Remove unused config files

config/cable.yml

@@ -1,10 +0,0 @@
-development:
-  adapter: async
-
-test:
-  adapter: test
-
-production:
-  adapter: redis
-  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
-  channel_prefix: danbooru_production

config/secrets.yml

@@ -1,22 +0,0 @@
-# Be sure to restart your server when you modify this file.
-
-# Your secret key is used for verifying the integrity of signed cookies.
-# If you change this key, all old signed cookies will become invalid!
-
-# Make sure the secret is at least 30 characters and all random,
-# no regular words or you'll be exposed to dictionary attacks.
-# You can use `rake secret` to generate a secure secret key.
-
-# Make sure the secrets in this file are kept private
-# if you're sharing your code publicly.
-
-development:
-  secret_key_base: bcc62a512b9c055c292c17742f1e65bd6d88fa37f4d01c8475103809f3ac4c03e3e98605c47d55cd8801333010ea98920a61b722770629926759624bce732539
-
-test:
-  secret_key_base: 60e32a818af77bdfc40bca866e3b4d7b88d7ba767057ffc9e4532279358af8c67d42f2b99c084b700727303ce25b812a592b52723ebc1e3b812fd09a1f969435
-
-# Do not keep production secrets in the repository,
-# instead read values from the environment.
-production:
-  secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>

config/spring.rb

@@ -1,6 +0,0 @@
-%w[
-  .ruby-version
-  .rbenv-vars
-  tmp/restart.txt
-  tmp/caching-dev.txt
-].each { |path| Spring.watch(path) }

config/storage.yml

@@ -1,34 +0,0 @@
-test:
-  service: Disk
-  root: <%= Rails.root.join("tmp/storage") %>
-
-local:
-  service: Disk
-  root: <%= Rails.root.join("storage") %>
-
-# Use rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key)
-# amazon:
-#   service: S3
-#   access_key_id: <%= Rails.application.credentials.dig(:aws, :access_key_id) %>
-#   secret_access_key: <%= Rails.application.credentials.dig(:aws, :secret_access_key) %>
-#   region: us-east-1
-#   bucket: your_own_bucket
-
-# Remember not to checkin your GCS keyfile to a repository
-# google:
-#   service: GCS
-#   project: your_project
-#   credentials: <%= Rails.root.join("path/to/gcs.keyfile") %>
-#   bucket: your_own_bucket
-
-# Use rails credentials:edit to set the Azure Storage secret (as azure_storage:storage_access_key)
-# microsoft:
-#   service: AzureStorage
-#   storage_account_name: your_account_name
-#   storage_access_key: <%= Rails.application.credentials.dig(:azure_storage, :storage_access_key) %>
-#   container: your_container_name
-
-# mirror:
-#   service: Mirror
-#   primary: local
-#   mirrors: [ amazon, google, microsoft ]