[gnome-builder] code-indexer: remove unnecessary annotation

[Christian Hergert <chergert src gnome org>]

commit 09c1002c6adf10c78e6d770309311bfca032d8ba
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 10 17:13:50 2017 -0800

    code-indexer: remove unnecessary annotation

 src/libide/symbols/ide-code-indexer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libide/symbols/ide-code-indexer.c b/src/libide/symbols/ide-code-indexer.c
index 03b50a5..fe2435c 100644
--- a/src/libide/symbols/ide-code-indexer.c
+++ b/src/libide/symbols/ide-code-indexer.c
@@ -75,7 +75,7 @@ ide_code_indexer_default_init (IdeCodeIndexerInterface *iface)
 /**
  * ide_code_indexer_index_file:
  * @self: An #IdeCodeIndexer instance.
- * @file: (not nullable): Source file to index.
+ * @file: Source file to index.
  * @build_flags: (out) (optional): array of build flags to parse @file.
  * @cancellable: (nullable): a #GCancellable.
  * @error: a #GError.