Remove a not mandatory deps (mbstring)
Remove a not mandatory deps (mbstring)

tejerka/atoum,GuillaumeDievart/atoum,jubianchi/atoum,Tiross/atoum,agallou/atoum,mikaelrandy/atoum,CedCannes/atoum,gpaton/atoum,tejerka/atoum,mageekguy/atoum,CedCannes/atoum,GuillaumeDievart/atoum,Tiross/atoum,gpaton/atoum,jubianchi/atoum,vonglasow/atoum,mikaelrandy/atoum,mageekguy/atoum,agallou/atoum,vonglasow/atoum