Remove broken delete from customGroupCreate

[colemanw]

Overview

Removes a broken api call from unit tests. This only affects tests.

Before

Have a crack at using the api with the wrong syntax.

After

Don't bother.

Technical Details

If you look closely at the api call, it was broken. Probably a copy-paste error, as other places in the test suite the params consist only of array('api.foo.bar' => 1) but here they accidentally wrapped that array in another array, which would cause it to be ignored.
Rather than fix it, I concluded that it isn't needed because tests pass without it.

Comments

Anything else you would like the reviewer to note

[civibot]

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[seamuslee001]

Merging this as only affects tests and Jenkins has oked it