Removed mac version not supported anymore to avoid unnecessary CI tasks (#7069)

## Motivation for features / changes
This MacOS version is not supported anymore as we intend to reduce
maintenance we opt for removing this task.

## Technical description of changes
This line defines the platforms on which the job runs.

Author: cdavalos7

.github/workflows/ci.yml

@@ -138,7 +138,7 @@ jobs:
       fail-fast: false
       matrix:
         mode: ['native']
-        platform: ['ubuntu-22.04', 'macos-13']
+        platform: ['ubuntu-22.04']
         rust_version: ['1.65.0']
         include:
           - mode: 'universal'