Remove yotta support from check-files.py

Complements "Remove Yotta support from the docs, tests and build scripts".
diff --git a/tests/scripts/check-files.py b/tests/scripts/check-files.py
index 0fb2117..ed67872 100755
--- a/tests/scripts/check-files.py
+++ b/tests/scripts/check-files.py
@@ -159,7 +159,6 @@
         self.excluded_paths = list(map(os.path.normpath, [
             'cov-int',
             'examples',
-            'yotta/module'
         ]))
         self.issues_to_check = [
             PermissionIssueTracker(),