Removed unnecessary volk include in dft.c
Removed unnecessary volk include in dft.c

AndersKaloer/srsLTE,oocran/vbbu,oocran/vbbu,AndersKaloer/srsLTE,Agmagor/srsLTE,oocran/vbbu,oocran/vbbu,oocran/vbbu,AndersKaloer/srsLTE,Agmagor/srsLTE,Agmagor/srsLTE