README.rst: Remove Prerequisite section
README.rst: Remove Prerequisite section

Removed redundancy. Closes https://github.com/coala/coala/issues/2977

RJ722/coala,jayvdb/coala,netman92/coala,coala/coala,ayushin78/coala,sils1297/coala,Asalle/coala,arush0311/coala,aptrishu/coala,meetmangukiya/coala,sagark123/coala,arjunsinghy96/coala,karansingh1559/coala,ayushin78/coala,meetmangukiya/coala,MariosPanag/coala,nemaniarjun/coala,SanketDG/coala,arjunsinghy96/coala,CruiseDevice/coala,shreyans800755/coala,yashLadha/coala,RJ722/coala,incorrectusername/coala,Asalle/coala,refeed/coala,rimacone/testing2,netman92/coala,damngamerz/coala,yashLadha/coala,yashLadha/coala,sils1297/coala,Balaji2198/coala,NiklasMM/coala,shreyans800755/coala,sagark123/coala,jayvdb/coala,impmihai/coala,Balaji2198/coala,CruiseDevice/coala,coala-analyzer/coala,Shade5/coala,MariosPanag/coala,yashtrivedi96/coala,karansingh1559/coala,arush0311/coala,aptrishu/coala,RJ722/coala,ayushin78/coala,JohnS-01/coala,arush0311/coala,impmihai/coala,damngamerz/coala,CruiseDevice/coala,rimacone/testing2,kartikeys98/coala,sils1297/coala,Asnelchristian/coala,nemaniarjun/coala,coala-analyzer/coala,SanketDG/coala,arjunsinghy96/coala,Shade5/coala,coala-analyzer/coala,rimacone/testing2,Nosferatul/coala,Asnelchristian/coala,yashtrivedi96/coala,aptrishu/coala,damngamerz/coala,jayvdb/coala,Asalle/coala,incorrectusername/coala,kartikeys98/coala,MariosPanag/coala,Balaji2198/coala,nemaniarjun/coala,netman92/coala,sagark123/coala,Asnelchristian/coala,meetmangukiya/coala,incorrectusername/coala,JohnS-01/coala,Nosferatul/coala,karansingh1559/coala,kartikeys98/coala,refeed/coala,SanketDG/coala,NiklasMM/coala,NiklasMM/coala,coala/coala,shreyans800755/coala,coala/coala,yashtrivedi96/coala,refeed/coala,JohnS-01/coala,Nosferatul/coala,Shade5/coala,impmihai/coala