Auto merge of #12464 - aneeshusa:cleanup-start-sending-sniffed, r=Wafflespeanut
Auto merge of #12464 - aneeshusa:cleanup-start-sending-sniffed, r=Wafflespeanut

Remove fn start_sending_sniffed

<!-- Please describe your changes on the following line: -->

This function was not used, but more importantly encodes the bad
practice of a raw `.unwrap()` and therefore should not be used.

---
<!-- 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
- [ ] These changes reference #12462 (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because they are a cleanup

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