queue2: warn if we can't remove our temporary file
queue2: warn if we can't remove our temporary file

It's not fatal though, so do not error out.

Coverity 1037121

shelsonjava/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,mparis/gstreamer,krichter722/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,mparis/gstreamer,Lachann/gstreamer,Lachann/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,cfoch/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,centricular/gstreamer,cfoch/gstreamer,centricular/gstreamer,centricular/gstreamer,mparis/gstreamer,cfoch/gstreamer,surround-io/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,centricular/gstreamer,jpakkane/gstreamer,krichter722/gstreamer