尊重客户已配置平台图标

dist/api/platform_config.php

@@ -8,7 +8,6 @@ require __DIR__ . '/im_web_bootstrap.php';
 
 $defaultName = 'Web IM';
 $defaultLogo = '/img/logo.ico';
-$legacyDefaultLogo = '/img/5IuOieu9PF8MJtp43kD2kCkdLVjVwDp7.ico';
 
 try {
     $statement = imAppDb()->prepare(
@@ -25,9 +24,6 @@ try {
 
     $platformName = $config['PlatformName'] ?? '';
     $logo = $config['sys_logo'] ?? '';
-    if (strcasecmp($logo, $legacyDefaultLogo) === 0) {
-        $logo = '';
-    }
     $version = implode('|', array_values(array_filter($updatedAtValues ?? [])));
 
     respond(0, 'success', [