This reverts commit 3adcf1e4.

Reason for revert: Likely not the cause of failures seen.

Original change's description:
> Revert "Don't call Texture::onDestroy twice for the zero textures."
> 
> This reverts commit d3e0e84c.
> 
> Reason for revert: likely cause for crbug.com/922296
> 
> BUG=chromium:922296
> 
> Original change's description:
> > Don't call Texture::onDestroy twice for the zero textures.
> > 
> > The BindingPointer will call onDestroy when all references are removed, no
> > need to do it explicitly.
> > 
> > BUG=angleproject:3070
> > 
> > Change-Id: Ic5dd4da8f73e204d26d9d3a3c6e1eff9fded5411
> > Reviewed-on: https://chromium-review.googlesource.com/c/1409868
> > Reviewed-by: Jamie Madill <jmadill@chromium.org>
> > Commit-Queue: Geoff Lang <geofflang@chromium.org>
> 
> TBR=geofflang@chromium.org,jmadill@chromium.org
> 
> Change-Id: I38097218d49940e7ac3ad914714294b019c154fd
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: angleproject:3070
> Reviewed-on: https://chromium-review.googlesource.com/c/1413239
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Commit-Queue: Corentin Wallez <cwallez@chromium.org>

TBR=geofflang@chromium.org,jmadill@chromium.org,cwallez@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:922296, angleproject:3070
Change-Id: I58b1c445f81e4a7f38df375fd3311043b571e834
Reviewed-on: https://chromium-review.googlesource.com/c/1417770Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>