I have 2 tables in 1 database.
In the 2 tables there are several rows with the same contents.

```
table visitor
--------------------------
id      |   mytoken1    |
--------------------------
1       |   token_abcd  |
2       |   token_efgh  |
3       |   token_ijkl  |
4       |   token_mnop  |
--------------------------

table favorites
--------------------------
id      |   mytoken2    |
--------------------------
1       |   token_abcd  |
2       |   token_efgh  |
3       |   token_ijkl  |
4       |   token_mnop  |
5       |   token_aaaa  |
6       |   token_bbbb  |
7       |   token_cccc  |
8       |   token_dddd  |
--------------------------

```

How do I delete the `mytoken2` column that is not in the `mytoken1` column?
So in the example above I want to delete 4 rows of data, including:

```
token_aaaa
token_bbbb
token_cccc
token_dddd

```

I have tried to find a solution until I was dizzy but it has not been resolved, I hope someone will help me here ..