diff --git a/.gitignore b/.gitignore
index 845929f4a..4804240ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ erl_crash.dump
 # secrets files as long as you replace their contents by environment
 # variables.
 /config/*.secret.exs
+/config/runtime.exs
 
 /setup_db.psql
 
diff --git a/config/dev.exs b/config/dev.exs
index 3209d7e56..970788f9c 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -97,20 +97,3 @@ config :mobilizon, :anonymous,
   reports: [
     allowed: true
   ]
-
-require Logger
-
-cond do
-  System.get_env("INSTANCE_CONFIG") &&
-      File.exists?("./config/#{System.get_env("INSTANCE_CONFIG")}") ->
-    import_config System.get_env("INSTANCE_CONFIG")
-
-  System.get_env("DOCKER", "false") == "false" && File.exists?("./config/dev.secret.exs") ->
-    import_config "dev.secret.exs"
-
-  System.get_env("DOCKER", "false") == "true" ->
-    Logger.info("Using environment configuration for Docker")
-
-  true ->
-    Logger.error("No configuration file found")
-end