Better icons for SEO widget (#11245)

* better SEO icons

* remove imports

plugins/SEO/Metric/Alexa.php

@@ -10,7 +10,6 @@ namespace Piwik\Plugins\SEO\Metric;
 
 use Piwik\Http;
 use Piwik\NumberFormatter;
-use Piwik\Plugins\Referrers\SearchEngine;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -43,7 +42,7 @@ class Alexa implements MetricsProvider
             $value = null;
         }
 
-        $logo = SearchEngine::getInstance()->getLogoFromUrl('http://alexa.com');
+        $logo = "plugins/SEO/images/alexa.com.png";
         $link = self::LINK . urlencode($domain);
 
         return array(

plugins/SEO/Metric/Bing.php

@@ -10,7 +10,6 @@ namespace Piwik\Plugins\SEO\Metric;
 
 use Piwik\Http;
 use Piwik\NumberFormatter;
-use Piwik\Plugins\Referrers\SearchEngine;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -47,7 +46,7 @@ class Bing implements MetricsProvider
             $pageCount = null;
         }
 
-        $logo = SearchEngine::getInstance()->getLogoFromUrl('http://bing.com');
+        $logo = "plugins/SEO/images/bing.com.png";
 
         return array(
             new Metric('bing-index', 'SEO_Bing_IndexedPages', $pageCount, $logo, null, null, 'General_Pages')

plugins/SEO/Metric/Dmoz.php

@@ -10,7 +10,6 @@ namespace Piwik\Plugins\SEO\Metric;
 
 use Piwik\Http;
 use Piwik\NumberFormatter;
-use Piwik\Plugins\Referrers\SearchEngine;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -54,7 +53,7 @@ class Dmoz implements MetricsProvider
             $value = null;
         }
 
-        $logo = SearchEngine::getInstance()->getLogoFromUrl('http://dmoz.org');
+        $logo = "plugins/SEO/images/dmoz.org.png";
 
         return array(
             new Metric('dmoz', 'SEO_Dmoz', $value, $logo)

plugins/SEO/Metric/Google.php

@@ -10,7 +10,6 @@ namespace Piwik\Plugins\SEO\Metric;
 
 use Piwik\Http;
 use Piwik\NumberFormatter;
-use Piwik\Plugins\Referrers\SearchEngine;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -37,7 +36,7 @@ class Google implements MetricsProvider
     {
         $pageCount = $this->fetchIndexedPagesCount($domain);
 
-        $logo = SearchEngine::getInstance()->getLogoFromUrl('http://google.com');
+        $logo = "plugins/SEO/images/google.com.png";
 
         return array(
             new Metric('google-index', 'SEO_Google_IndexedPages', $pageCount, $logo, null, null, 'General_Pages'),