Remove redundant identifier

Signed-off-by: Fernando Pérez-García <fepegar@gmail.com>

Author: fepegar

CITATION.cff

@@ -4,10 +4,6 @@ message: >-
   If you use this software, please cite it using the
   metadata from this file.
 type: software
-identifiers:
-  - type: doi
-    value: 10.1016/j.media.2024.103207
-    description: Research article
 repository-code: 'https://github.com/Project-MONAI/MONAILabel'
 url: 'https://docs.monai.io/projects/label/'
 license: Apache-2.0
@@ -45,8 +41,8 @@ preferred-citation:
       family-names: Feng
     - given-names: M. Jorge
       family-names: Cardoso
-  doi: "10.1016/j.media.2024.103207"
-  journal: "Medical Image Analysis"
-  title: "MONAI Label: A framework for AI-assisted interactive labeling of 3D medical images"
+  doi: '10.1016/j.media.2024.103207'
+  journal: 'Medical Image Analysis'
+  title: 'MONAI Label: A framework for AI-assisted interactive labeling of 3D medical images'
   volume: 95
   year: 2024