Merge pull request #30147 from yhirano55/fix_trailing_blank_lines

[Active Storage] `rubocop -a --only Layout/TrailingBlankLines`

activestorage/lib/active_storage/attached/many.rb

@@ -51,4 +51,3 @@ def purge_later
     end
   end
 end
-

activestorage/lib/active_storage/service/disk_service.rb

@@ -124,4 +124,3 @@ def ensure_integrity_of(key, checksum)
       end
   end
 end
-