R1:a2cb5e134755

Log and continue when trying to destroy edges with no edge definition

Summary: Fixes T11201.

Test Plan:
Created bogus edges like this:

```
INSERT INTO edge (src, type, dst, dateCreated, seq) values ('PHID-TASK-vnddativbialb5p6ymis', 999999, 'quack', UNIX_TIMESTAMP(), 1);
```

Then ran `bin/remove destroy` on the relevant object.

Before the patch, destruction halted after hittin the bad edge.

After the patch, a warning is emitted but destruction continues.

Reviewers: chad

Reviewed By: chad

Maniphest…