[gold] search-controls-sk.html: Remove obsolete call to the Polymer-based query-dialog-sk's close() method.
[gold] search-controls-sk.html: Remove obsolete call to the Polymer-based query-dialog-sk's close() method.

This method does not exist in the lit-html QueryDialogSk currently in use.

This should be safe to delete since it should be impossible for the corpus to change while the query dialog is open.

Change-Id: I7a52aaf7092b27d688443558da80327b298fa4d8
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/297474
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Commit-Queue: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>

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