Revert "Added system option to enable case insensitive urls. (#1638)"

This reverts commit 481fe1903e.

system/blueprints/config/system.yaml

@@ -1154,17 +1154,6 @@ form:
                     validate:
                         type: bool
 
-                case_insensitive_urls:
-                    type: toggle
-                    label: PLUGIN_ADMIN.CASE_INSENSITIVE_URLS
-                    highlight: 0
-                    help: PLUGIN_ADMIN.CASE_INSENSITIVE_URLS_HELP
-                    options:
-                        1: PLUGIN_ADMIN.YES
-                        0: PLUGIN_ADMIN.NO
-                    validate:
-                        type: bool
-
                 param_sep:
                     type: select
                     size: medium

system/src/Grav/Common/Uri.php

@@ -291,11 +291,6 @@ class Uri
 
         $this->url = $this->base . $this->uri;
 
-        // if case insensitive urls is enabled, lowercase the url
-        if( $grav['config']->get('system.case_insensitive_urls') ){
-            $this->url = strtolower($this->url);
-        }
-
         // get any params and remove them
         $uri = str_replace($this->root, '', $this->url);