[gnome-build-meta] core-deps/espeak.bst: remove redundant ref

[Abderrahim Kitouni <akitouni src gnome org>]

commit 313e50ff79d9dac3e22e58d4fbcdd8f41b4d725b
Author: Abderrahim Kitouni <akitouni gnome org>
Date:   Mon May 4 16:25:40 2020 +0000

    core-deps/espeak.bst: remove redundant ref

 elements/core-deps/espeak.bst | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/elements/core-deps/espeak.bst b/elements/core-deps/espeak.bst
index fd840407..0693c0b6 100644
--- a/elements/core-deps/espeak.bst
+++ b/elements/core-deps/espeak.bst
@@ -2,7 +2,6 @@ kind: manual
 sources:
 - kind: zip
   url: sourceforge_net:espeak/files/espeak/espeak-1.48/espeak-1.48.04-source.zip
-  ref: bf9a17673adffcc28ff7ea18764f06136547e97bbd9edf2ec612f09b207f0659
 depends:
 - core-deps/portaudio.bst
 - freedesktop-sdk.bst:bootstrap-import.bst