Currently, when doing a search and replace with --report-changed-only, if the table has no primary key, it still prints the name of the table and the string 'skipped'.

It should only add to report when this flag isn't present.

example:

wp search-replace 'aaaaaaaaa' 'bbbbbbb' --report-changed-only --url="example.com" --network

will print:

+------------+--------+--------------+------+
| Table      | Column | Replacements | Type |
+------------+--------+--------------+------+
| wp_example |        | skipped      |      |
+------------+--------+--------------+------+