Remove parentheses from if statement
Remove parentheses from if statement

Otherwise Rubocop will give a warning.

As mentioned in !3197.

mr-dxdy/gitlabhq,shinexiao/gitlabhq,daiyu/gitlab-zh,htve/GitlabForChinese,mr-dxdy/gitlabhq,martijnvermaat/gitlabhq,dwrensha/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,jirutka/gitlabhq,SVArago/gitlabhq,Soullivaneuh/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,shinexiao/gitlabhq,darkrasid/gitlabhq,martijnvermaat/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,SVArago/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,darkrasid/gitlabhq,dwrensha/gitlabhq,darkrasid/gitlabhq,allysonbarros/gitlabhq,htve/GitlabForChinese,openwide-java/gitlabhq,screenpages/gitlabhq,darkrasid/gitlabhq,mr-dxdy/gitlabhq,htve/GitlabForChinese,dwrensha/gitlabhq,SVArago/gitlabhq,martijnvermaat/gitlabhq,t-zuehlsdorff/gitlabhq,iiet/iiet-git,mr-dxdy/gitlabhq,larryli/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,screenpages/gitlabhq,dreampet/gitlab,shinexiao/gitlabhq,icedwater/gitlabhq,screenpages/gitlabhq,Soullivaneuh/gitlabhq,larryli/gitlabhq,daiyu/gitlab-zh,icedwater/gitlabhq,dreampet/gitlab,LUMC/gitlabhq,larryli/gitlabhq,SVArago/gitlabhq,mmkassem/gitlabhq,shinexiao/gitlabhq,Soullivaneuh/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,allysonbarros/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,larryli/gitlabhq,dplarson/gitlabhq,LUMC/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,icedwater/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,htve/GitlabForChinese,daiyu/gitlab-zh,t-zuehlsdorff/gitlabhq,LUMC/gitlabhq,martijnvermaat/gitlabhq,allysonbarros/gitlabhq,openwide-java/gitlabhq,daiyu/gitlab-zh,screenpages/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,dwrensha/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,allysonbarros/gitlabhq,iiet/iiet-git