Remove unnecessary ref from Stickerpicker
Remove unnecessary ref from Stickerpicker

There is a ref=target in the call to render AccessibleButton for
the hide stickers button. This ref is not present in the show case.

When clicking the stickerpicker show button, React gives a warning:

> Warning: Stateless function components cannot be given refs
> (See ref "target" in AccessibleButton created by Stickerpicker).
> Attempts to access this ref will fail.

Removed the ref. Stickerpicker hide/show still works fine, no warning.

Signed-off-by: Jason Robinson <73c4b53c33b2f03b4e26d9578bea93e0ed8e16b0@matrix.org>

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk