remove direnv/dotenv examples from readme.

Author: syphar

README.md

@@ -65,8 +65,7 @@ cargo build
 # Start the external services
 docker-compose up -d db s3
 # anything that doesn't run via docker-compose needs the settings defined in 
-# .env. Either via `. .env` as below, or via any dotenv shell integration
-(dotenv, direnv, ...).
+# .env. Either via `. .env` as below, or via any dotenv shell integration.
 . .env
 # Setup the database you just created
 cargo run -- database migrate