Remove duplicated Linkcheck plugin declaration, issue #751
Remove duplicated Linkcheck plugin declaration, issue #751

WilliamRen/checkstyle,zofuthan/checkstyle-1,jonmbake/checkstyle,Bhavik3/checkstyle,mkordas/checkstyle,pietern/checkstyle,ivanov-alex/checkstyle,llocc/checkstyle,rnveach/checkstyle,romani/checkstyle,MEZk/checkstyle,liscju/checkstyle,jochenvdv/checkstyle,vboerchers/checkstyle,rnveach/checkstyle,sirdis/checkstyle,pietern/checkstyle,romani/checkstyle,rnveach/checkstyle,attatrol/checkstyle,cs1331/checkstyle,liscju/checkstyle,jochenvdv/checkstyle,liscju/checkstyle,AkshitaKukreja30/checkstyle,sharang108/checkstyle,Godin/checkstyle,ilanKeshet/checkstyle,izishared/checkstyle,romani/checkstyle,nikhilgupta23/checkstyle,Bhavik3/checkstyle,universsky/checkstyle,designreuse/checkstyle,FeodorFitsner/checkstyle,romani/checkstyle,naver/checkstyle,attatrol/checkstyle,sabaka/checkstyle,llocc/checkstyle,jochenvdv/checkstyle,rmswimkktt/checkstyle,checkstyle/checkstyle,jonmbake/checkstyle,WonderCsabo/checkstyle,izishared/checkstyle,gallandarakhneorg/checkstyle,WonderCsabo/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,mkordas/checkstyle,sirdis/checkstyle,philwebb/checkstyle,vboerchers/checkstyle,FeodorFitsner/checkstyle,philwebb/checkstyle,universsky/checkstyle,another-dave/checkstyle,MEZk/checkstyle,rnveach/checkstyle,ilanKeshet/checkstyle,autermann/checkstyle,naver/checkstyle,baratali/checkstyle,FeodorFitsner/checkstyle,mkordas/checkstyle,checkstyle/checkstyle,baratali/checkstyle,nikhilgupta23/checkstyle,attatrol/checkstyle,StetsiukRoman/checkstyle,WonderCsabo/checkstyle,beckerhd/checkstyle,bansalayush/checkstyle,romani/checkstyle,WilliamRen/checkstyle,pietern/checkstyle,jonmbake/checkstyle,bansalayush/checkstyle,HubSpot/checkstyle,naver/checkstyle,HubSpot/checkstyle,Bhavik3/checkstyle,HubSpot/checkstyle,rmswimkktt/checkstyle,izishared/checkstyle,cs1331/checkstyle,beckerhd/checkstyle,checkstyle/checkstyle,bansalayush/checkstyle,beckerhd/checkstyle,autermann/checkstyle,romani/checkstyle,WilliamRen/checkstyle,sharang108/checkstyle,ilanKeshet/checkstyle,StetsiukRoman/checkstyle,another-dave/checkstyle,gallandarakhneorg/checkstyle,autermann/checkstyle,ivanov-alex/checkstyle,universsky/checkstyle,vboerchers/checkstyle,checkstyle/checkstyle,philwebb/checkstyle,ivanov-alex/checkstyle,another-dave/checkstyle,rnveach/checkstyle,designreuse/checkstyle,baratali/checkstyle,gallandarakhneorg/checkstyle,Godin/checkstyle,checkstyle/checkstyle,llocc/checkstyle,sabaka/checkstyle,sharang108/checkstyle,designreuse/checkstyle,jasonchaffee/checkstyle,nikhilgupta23/checkstyle,zofuthan/checkstyle-1,AkshitaKukreja30/checkstyle,jasonchaffee/checkstyle,rmswimkktt/checkstyle,Godin/checkstyle,MEZk/checkstyle,sabaka/checkstyle,cs1331/checkstyle,AkshitaKukreja30/checkstyle,jasonchaffee/checkstyle,sirdis/checkstyle,StetsiukRoman/checkstyle,zofuthan/checkstyle-1