Don't filter QA warning for --disable-dep...

This reverts commit f3785f651bff9febc0bb3be4f0ee8e4d732495d5.
It's unnecessary to filter since now we check configure --help output
for disable-dependency-tracking (bug #211529).
diff --git a/pym/portage/package/ebuild/doebuild.py b/pym/portage/package/ebuild/doebuild.py
index f1f8260..aeb3f86 100644
--- a/pym/portage/package/ebuild/doebuild.py
+++ b/pym/portage/package/ebuild/doebuild.py
@@ -1237,10 +1237,6 @@
 	configure_opts_warn = []
 	configure_opts_warn_re = re.compile(
 		r'^configure: WARNING: [Uu]nrecognized options: ')
-	# --disable-dependency-tracking is passed by default in EAPI 4;
-	# filter the warning if this is the only unrecognized option.
-	configure_opts_warn_exclude_re = re.compile(
-		r': --disable-dependency-tracking$')
 
 	# Exclude output from dev-libs/yaz-3.0.47 which looks like this:
 	#
@@ -1272,8 +1268,7 @@
 			if helper_missing_file_re.match(line) is not None:
 				helper_missing_file.append(line.rstrip("\n"))
 
-			if configure_opts_warn_re.match(line) is not None and \
-				configure_opts_warn_exclude_re.search(line) is None:
+			if configure_opts_warn_re.match(line) is not None:
 				configure_opts_warn.append(line.rstrip("\n"))
 
 			if make_jobserver_re.match(line) is not None: