Revert "added BC until https://github.com/symfony/symfony/pull/141 is merged"
Revert "added BC until https://github.com/symfony/symfony/pull/141 is merged"

This reverts commit 05a9d4ce7f4d9725466df4acf4a2ab83bf84f4f6.

shandy05/assetic,shandy05/assetic,Sgoettschkes/assetic,renaatdemuynck/assetic,sportradar/assetic,stof/assetic,webmozart/assetic,matthiasmullie/assetic,kriswallsmith/assetic,shandy05/assetic,mubassirhayat/assetic,sportradar/assetic,shandy05/assetic,fredemmott/assetic,mubassirhayat/assetic,sportradar/assetic,lenar/assetic,kriswallsmith/assetic,lenar/assetic,webmozart/assetic,renaatdemuynck/assetic,dtee/assetic,matthiasmullie/assetic,stof/assetic,fredemmott/assetic,lenar/assetic,lellimecnar/assetic,kriswallsmith/assetic,dtee/assetic,Sgoettschkes/assetic,webmozart/assetic,matthiasmullie/assetic,fredemmott/assetic,mubassirhayat/assetic,lellimecnar/assetic,renaatdemuynck/assetic,Sgoettschkes/assetic,lenar/assetic,Sgoettschkes/assetic,kriswallsmith/assetic,lellimecnar/assetic,lellimecnar/assetic,matthiasmullie/assetic,renaatdemuynck/assetic