[librsvg] Revert "Run clippy all the time, now that the lint warnings are fixed"

[Federico Mena Quintero <federico src gnome org>]

commit acdd791f7dcb34658677ff62d7bbb349538241f8
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Aug 27 18:46:53 2020 -0500

    Revert "Run clippy all the time, now that the lint warnings are fixed"
    
    It doesn't work :-P
    
    This reverts commit 1e8e5a1866f482cdaa6cc4320a3ceb7c920429a4.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 52f94bd0..54214be1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -169,7 +169,7 @@ clippy:
     - rustc --version && cargo --version
     - cargo install clippy --force
     - cargo clippy --all
-#  when: manual
+  when: manual
 
 tarball:
   image: $AMD64_OPENSUSE_TUMBLEWEED