Auto merge of #17905 - abahmed:update_CEF_port, r=emilio
Auto merge of #17905 - abahmed:update_CEF_port, r=emilio

Issue 17882: Remove rendering_threads option in the CEF port

Fixes issue 17882 by removing rendering_threads option in the CEF port
r?@highfive

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/17905)
<!-- Reviewable:end -->

larsbergstrom/servo,avadacatavra/servo,dati91/servo,emilio/servo,DominoTree/servo,sadmansk/servo,emilio/servo,nnethercote/servo,SimonSapin/servo,paulrouget/servo,cbrewster/servo,pyfisch/servo,dsandeephegde/servo,sadmansk/servo,canaltinova/servo,pyfisch/servo,nnethercote/servo,KiChjang/servo,thiagopnts/servo,anthgur/servo,emilio/servo,emilio/servo,mbrubeck/servo,dati91/servo,fiji-flo/servo,nnethercote/servo,KiChjang/servo,ConnorGBrewster/servo,upsuper/servo,emilio/servo,avadacatavra/servo,cbrewster/servo,CJ8664/servo,emilio/servo,CJ8664/servo,dati91/servo,mbrubeck/servo,notriddle/servo,rnestler/servo,larsbergstrom/servo,nnethercote/servo,SimonSapin/servo,mbrubeck/servo,nnethercote/servo,paulrouget/servo,sadmansk/servo,canaltinova/servo,emilio/servo,splav/servo,avadacatavra/servo,saneyuki/servo,avadacatavra/servo,CJ8664/servo,peterjoel/servo,peterjoel/servo,splav/servo,peterjoel/servo,thiagopnts/servo,mattnenterprise/servo,KiChjang/servo,notriddle/servo,rnestler/servo,dati91/servo,mattnenterprise/servo,szeged/servo,thiagopnts/servo,sadmansk/servo,SimonSapin/servo,saneyuki/servo,dsandeephegde/servo,eddyb/servo,eddyb/servo,thiagopnts/servo,jimberlage/servo,notriddle/servo,rnestler/servo,paulrouget/servo,dsandeephegde/servo,upsuper/servo,notriddle/servo,jimberlage/servo,DominoTree/servo,cbrewster/servo,cbrewster/servo,larsbergstrom/servo,canaltinova/servo,dati91/servo,avadacatavra/servo,jimberlage/servo,upsuper/servo,thiagopnts/servo,splav/servo,dsandeephegde/servo,larsbergstrom/servo,splav/servo,upsuper/servo,saneyuki/servo,avadacatavra/servo,fiji-flo/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,saneyuki/servo,splav/servo,dsandeephegde/servo,splav/servo,anthgur/servo,DominoTree/servo,anthgur/servo,cbrewster/servo,eddyb/servo,rnestler/servo,sadmansk/servo,canaltinova/servo,larsbergstrom/servo,mbrubeck/servo,thiagopnts/servo,KiChjang/servo,dati91/servo,KiChjang/servo,DominoTree/servo,saneyuki/servo,DominoTree/servo,emilio/servo,saneyuki/servo,thiagopnts/servo,saneyuki/servo,fiji-flo/servo,jimberlage/servo,dati91/servo,dsandeephegde/servo,peterjoel/servo,paulrouget/servo,DominoTree/servo,anthgur/servo,paulrouget/servo,saneyuki/servo,anthgur/servo,pyfisch/servo,larsbergstrom/servo,upsuper/servo,eddyb/servo,rnestler/servo,szeged/servo,larsbergstrom/servo,larsbergstrom/servo,larsbergstrom/servo,canaltinova/servo,mattnenterprise/servo,peterjoel/servo,jimberlage/servo,eddyb/servo,nnethercote/servo,upsuper/servo,SimonSapin/servo,canaltinova/servo,mbrubeck/servo,upsuper/servo,anthgur/servo,DominoTree/servo,peterjoel/servo,eddyb/servo,anthgur/servo,szeged/servo,mbrubeck/servo,paulrouget/servo,CJ8664/servo,peterjoel/servo,SimonSapin/servo,pyfisch/servo,jimberlage/servo,mattnenterprise/servo,nnethercote/servo,fiji-flo/servo,eddyb/servo,fiji-flo/servo,szeged/servo,KiChjang/servo,eddyb/servo,nnethercote/servo,notriddle/servo,saneyuki/servo,notriddle/servo,ConnorGBrewster/servo,peterjoel/servo,upsuper/servo,fiji-flo/servo,dati91/servo,CJ8664/servo,szeged/servo,peterjoel/servo,sadmansk/servo,pyfisch/servo,jimberlage/servo,SimonSapin/servo,szeged/servo,fiji-flo/servo,rnestler/servo,cbrewster/servo,szeged/servo,KiChjang/servo,DominoTree/servo,saneyuki/servo,nnethercote/servo,cbrewster/servo,dsandeephegde/servo,CJ8664/servo,szeged/servo,paulrouget/servo,splav/servo,avadacatavra/servo,jimberlage/servo,ConnorGBrewster/servo,mattnenterprise/servo,szeged/servo,SimonSapin/servo,mbrubeck/servo,notriddle/servo,SimonSapin/servo,paulrouget/servo,paulrouget/servo,DominoTree/servo,KiChjang/servo,pyfisch/servo,jimberlage/servo,cbrewster/servo,notriddle/servo,szeged/servo,emilio/servo,splav/servo,thiagopnts/servo,notriddle/servo,anthgur/servo,mattnenterprise/servo,pyfisch/servo,pyfisch/servo,KiChjang/servo,larsbergstrom/servo,paulrouget/servo,notriddle/servo,rnestler/servo,avadacatavra/servo,DominoTree/servo,sadmansk/servo,pyfisch/servo,canaltinova/servo,ConnorGBrewster/servo,canaltinova/servo,splav/servo,sadmansk/servo,peterjoel/servo,mattnenterprise/servo,CJ8664/servo,fiji-flo/servo,mattnenterprise/servo,ConnorGBrewster/servo,mbrubeck/servo,splav/servo,CJ8664/servo,pyfisch/servo,dsandeephegde/servo,nnethercote/servo,emilio/servo,rnestler/servo,KiChjang/servo,ConnorGBrewster/servo