diff --git a/src/base/http/types.h b/src/base/http/types.h
index c817dfa9b..2e16d9630 100644
--- a/src/base/http/types.h
+++ b/src/base/http/types.h
@@ -63,14 +63,10 @@ namespace Http
     const char HEADER_REQUEST_METHOD_POST[] = "POST";
 
     const char CONTENT_TYPE_HTML[] = "text/html";
-    const char CONTENT_TYPE_JS[] = "application/javascript";
     const char CONTENT_TYPE_JSON[] = "application/json";
-    const char CONTENT_TYPE_BMP[] = "image/bmp";
     const char CONTENT_TYPE_GIF[] = "image/gif";
-    const char CONTENT_TYPE_JPEG[] = "image/jpeg";
     const char CONTENT_TYPE_PNG[] = "image/png";
     const char CONTENT_TYPE_TXT[] = "text/plain";
-    const char CONTENT_TYPE_SVG[] = "image/svg+xml";
     const char CONTENT_TYPE_FORM_ENCODED[] = "application/x-www-form-urlencoded";
     const char CONTENT_TYPE_FORM_DATA[] = "multipart/form-data";