[Bug 756905] audiofx: remove unused variable

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=756905

--- Comment #1 from RaviKiran <ravi.kiran at samsung.com> ---
Created attachment 313809
  --> https://bugzilla.gnome.org/attachment.cgi?id=313809&action=edit
remove unused variable

Patch attached. Pls review.

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