[console] remove drupal/console-dotenv dependency. (#3800)

Author: jmolivas

composer.json

@@ -42,7 +42,6 @@
         "doctrine/annotations": "^1.2",
         "doctrine/collections": "^1.3",
         "drupal/console-core": "dev-master",
-        "drupal/console-dotenv": "~0",
         "drupal/console-extend-plugin": "~0",
         "guzzlehttp/guzzle": "~6.1",
         "psy/psysh": "0.6.* || ~0.8",
@@ -51,6 +50,9 @@
         "symfony/http-foundation": "~2.8|~3.0",
         "symfony/thanks": "^1.0"
     },
+    "suggest": {
+        "drupal/console-dotenv": "This project provide support for env and contains a new command to setup dotenv on a drupal site."
+    },
     "bin": ["bin/drupal"],
     "config": {
         "bin-dir": "bin/",