[zendframework/zf2#4425] Removed DI-specific code
[zendframework/zf2#4425] Removed DI-specific code

- No tests for that functionality, and implementation felt like unneccessary
  coupling between Form and DI.

svycka/zend-mvc,svycka/zend-mvc,turrsis/zend-mvc,MadCat34/zend-mvc,ezimuel/zend-mvc,ezimuel/zend-mvc,MadCat34/zend-mvc,turrsis/zend-mvc