Fix username issue

Author: hetulvp

.github/workflows/update_leaderboard_after_merge.yaml

@@ -30,13 +30,6 @@ jobs:
           echo "Found merge commit: $merge_commit"
           echo "merge_commit=$merge_commit" >> "$GITHUB_ENV"
 
-      # Merge commit has maintainer's name so we get name from second last commit
-      - name: Get original author's name
-        id: original_author
-          merge_commit=$(git log --merges --pretty=format:%H -1 $GITHUB_SHA)
-          echo "Found merge commit: $merge_commit"
-          echo "merge_commit=$merge_commit" >> "$GITHUB_ENV"
-
       - name: Set original author
         run: |
           if [ -n "$merge_commit" ] && [ "$GITHUB_SHA" = "$merge_commit" ]; then