CI: only master branch of fsl/conda/manifest needs to be updated

.ci/update_manifest.py

@@ -84,14 +84,14 @@ def main(server=None, token=None, tag=None):
     if token  is None: token  = os.environ['FSL_CI_API_TOKEN']
     if tag    is None: tag    = os.environ['CI_COMMIT_TAG']
 
-    for destination in ['master', 'internal']:
-        branch = checkout_and_update_manifest(server, token, tag, destination)
-        open_merge_request(MANIFEST_PATH,
-                           branch,
-                           MERGE_REQUEST_MSG,
-                           server,
-                           token,
-                           destination)
+    destination = 'master'
+    branch = checkout_and_update_manifest(server, token, tag, destination)
+    open_merge_request(MANIFEST_PATH,
+                       branch,
+                       MERGE_REQUEST_MSG,
+                       server,
+                       token,
+                       destination)
 
 
 if __name__ == '__main__':