removed gene column and updated severe_impact column names in variants table
removed gene column and updated severe_impact column names in variants table

udp3f/gemini,bpow/gemini,heuermh/gemini,bw2/gemini,bgruening/gemini,bpow/gemini,bgruening/gemini,bpow/gemini,brentp/gemini,bw2/gemini,arq5x/gemini,xuzetan/gemini,xuzetan/gemini,brentp/gemini,bw2/gemini,udp3f/gemini,arq5x/gemini,bgruening/gemini,arq5x/gemini,bw2/gemini,brentp/gemini,heuermh/gemini,bpow/gemini,heuermh/gemini,xuzetan/gemini,udp3f/gemini,arq5x/gemini,udp3f/gemini,brentp/gemini,xuzetan/gemini,bgruening/gemini,heuermh/gemini