Remove JSMinifier implementation

src/View/JSMinifier.php

@@ -1,30 +0,0 @@
-<?php
-
-namespace SilverStripe\View;
-
-use Exception;
-use JSMin;
-
-class JSMinifier implements Requirements_Minifier
-{
-
-    public function minify($content, $type, $filename)
-    {
-        // Non-js files aren't minified
-        if ($type !== 'js') {
-            return $content . "\n";
-        }
-
-        // Combine JS
-        try {
-            require_once('jsmin/jsmin.php');
-            increase_time_limit_to();
-            $content = JSMin::minify($content);
-        } catch (Exception $e) {
-            $message = $e->getMessage();
-            user_error("Failed to minify {$filename}, exception: {$message}", E_USER_WARNING);
-        } finally {
-            return $content . ";\n";
-        }
-    }
-}

tests/php/View/SSViewerTest.php

@@ -8,7 +8,6 @@ use SilverStripe\Control\ContentNegotiator;
 use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Core\Convert;
 use SilverStripe\Core\Injector\Injector;
-use SilverStripe\Dev\Debug;
 use SilverStripe\Dev\SapphireTest;
 use SilverStripe\i18n\i18n;
 use SilverStripe\ORM\DataObject;