1031: remove deprecated FilenameIndex#getVirtualFilesByName method usage

Author: doninAtwix

src/com/magento/idea/magento2plugin/reference/provider/FilePathReferenceProvider.java

@@ -117,7 +117,6 @@ private Collection<VirtualFile> getFiles(@NotNull PsiElement element)
         if (fileName.matches(".*\\.\\w+$")) {
             // extension presents
             files = FilenameIndex.getVirtualFilesByName(
-                    element.getProject(),
                     fileName,
                     GlobalSearchScope.allScope(element.getProject())
             );