Remove extract_text and extract_doc in favor of extract_sigle

Change-Id: I6577a8f453baab96e684da3b2238a31b4f0175e3
diff --git a/t/multiple_archives.t b/t/multiple_archives.t
index 1da4e9d..7e2a0e7 100644
--- a/t/multiple_archives.t
+++ b/t/multiple_archives.t
@@ -60,7 +60,7 @@
 my $dir = tempdir(CLEANUP => 1);
 {
   local $SIG{__WARN__} = sub {};
-  ok($archive->extract_text($list[0], $dir), 'Wrong path');
+  ok($archive->extract_sigle([$list[0]], $dir), 'Wrong path');
 };
 
 ok(-d catdir($dir, 'WPD15'), 'Test corpus directory exists');