[niepce] exempi: Fix crash in test

[Hubert Figuière <hub src gnome org>]

commit 84333211b7fd0384832055c3e6454aa0c90344e5
Author: Hubert Figuière <hub figuiere net>
Date:   Sun Mar 4 11:33:12 2018 -0500

    exempi: Fix crash in test
    
    - never call exempi::terminate()

 src/fwk/utils/exempi.rs | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/src/fwk/utils/exempi.rs b/src/fwk/utils/exempi.rs
index 4c5326d..eca2444 100644
--- a/src/fwk/utils/exempi.rs
+++ b/src/fwk/utils/exempi.rs
@@ -61,13 +61,6 @@ impl ExempiManager {
     }
 }
 
-impl Drop for ExempiManager {
-    fn drop(&mut self) {
-        exempi::terminate();
-    }
-}
-
-
 pub struct XmpMeta {
     pub xmp: Xmp,
     keywords: Vec<String>,