minor #37528 clean up HHVM instructions (xabbuh)
minor #37528 clean up HHVM instructions (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
----------

clean up HHVM instructions

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

81a4baf4ba clean up HHVM instructions

tgalopin/symfony,paradajozsef/symfony,Tobion/symfony,xabbuh/symfony,mweimerskirch/symfony,paradajozsef/symfony,xabbuh/symfony,HeahDude/symfony,Taluu/symfony,symfony/symfony,smatyas/symfony,smatyas/symfony,Slamdunk/symfony,tucksaun/symfony,tgalopin/symfony,Slamdunk/symfony,mweimerskirch/symfony,jderusse/symfony,Deamon/symfony,Deamon/symfony,mpdude/symfony,phramz/symfony,oleg-andreyev/symfony,derrabus/symfony,ro0NL/symfony,sgehrig/symfony,hhamon/symfony,ogizanagi/symfony,OskarStark/symfony,kbond/symfony,stof/symfony,HeahDude/symfony,tucksaun/symfony,nicolas-grekas/symfony,Tobion/symfony,nicolas-grekas/symfony,ro0NL/symfony,jvasseur/symfony,oleg-andreyev/symfony,MatTheCat/symfony,derrabus/symfony,damienalexandre/symfony,sgehrig/symfony,mweimerskirch/symfony,xabbuh/symfony,stof/symfony,HeahDude/symfony,damienalexandre/symfony,MatTheCat/symfony,oleg-andreyev/symfony,jderusse/symfony,mweimerskirch/symfony,kbond/symfony,OskarStark/symfony,Tobion/symfony,tucksaun/symfony,pierredup/symfony,hhamon/symfony,curry684/symfony,mpdude/symfony,paradajozsef/symfony,nicolas-grekas/symfony,nicolas-grekas/symfony,lyrixx/symfony,phramz/symfony,zerkms/symfony,symfony/symfony,derrabus/symfony,d-ph/symfony,MatTheCat/symfony,symfony/symfony,lyrixx/symfony,hhamon/symfony,smatyas/symfony,kbond/symfony,stof/symfony,sgehrig/symfony,smatyas/symfony,curry684/symfony,d-ph/symfony,Nyholm/symfony,Tobion/symfony,jderusse/symfony,smatyas/symfony,curry684/symfony,ro0NL/symfony,tgalopin/symfony,Deamon/symfony,OskarStark/symfony,fabpot/symfony,jvasseur/symfony,sgehrig/symfony,Slamdunk/symfony,oleg-andreyev/symfony,stof/symfony,fabpot/symfony,zerkms/symfony,damienalexandre/symfony,lyrixx/symfony,MatTheCat/symfony,pierredup/symfony,ro0NL/symfony,Taluu/symfony,pierredup/symfony,xabbuh/symfony,ogizanagi/symfony,fabpot/symfony,hhamon/symfony,OskarStark/symfony,lyrixx/symfony,Taluu/symfony,symfony/symfony,Deamon/symfony,Deamon/symfony,Slamdunk/symfony,paradajozsef/symfony,phramz/symfony,fabpot/symfony,curry684/symfony,d-ph/symfony,tgalopin/symfony,derrabus/symfony,jvasseur/symfony,mpdude/symfony,zerkms/symfony,phramz/symfony,mpdude/symfony,tucksaun/symfony,d-ph/symfony,Nyholm/symfony,ogizanagi/symfony,kbond/symfony,mweimerskirch/symfony,HeahDude/symfony,Taluu/symfony,jvasseur/symfony,damienalexandre/symfony,zerkms/symfony,ogizanagi/symfony,Nyholm/symfony,jderusse/symfony,pierredup/symfony,Nyholm/symfony