Update cal-heatmap style overrides
Update cal-heatmap style overrides

Some were no longer needed, others needed `!important`.

martijnvermaat/gitlabhq,yatish27/gitlabhq,allysonbarros/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,icedwater/gitlabhq,duduribeiro/gitlabhq,mmkassem/gitlabhq,darkrasid/gitlabhq,jirutka/gitlabhq,SVArago/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,Soullivaneuh/gitlabhq,mrb/gitlabhq,mr-dxdy/gitlabhq,axilleas/gitlabhq,openwide-java/gitlabhq,darkrasid/gitlabhq,dwrensha/gitlabhq,axilleas/gitlabhq,SVArago/gitlabhq,jirutka/gitlabhq,jrjang/gitlab-ce,jrjang/gitlabhq,LUMC/gitlabhq,axilleas/gitlabhq,icedwater/gitlabhq,larryli/gitlabhq,htve/GitlabForChinese,openwide-java/gitlabhq,dplarson/gitlabhq,Datacom/gitlabhq,mmkassem/gitlabhq,jrjang/gitlabhq,dwrensha/gitlabhq,dreampet/gitlab,dreampet/gitlab,openwide-java/gitlabhq,daiyu/gitlab-zh,screenpages/gitlabhq,daiyu/gitlab-zh,larryli/gitlabhq,dplarson/gitlabhq,jrjang/gitlabhq,axilleas/gitlabhq,jrjang/gitlab-ce,jrjang/gitlab-ce,t-zuehlsdorff/gitlabhq,Soullivaneuh/gitlabhq,larryli/gitlabhq,htve/GitlabForChinese,Datacom/gitlabhq,shinexiao/gitlabhq,duduribeiro/gitlabhq,larryli/gitlabhq,dreampet/gitlab,yatish27/gitlabhq,daiyu/gitlab-zh,mrb/gitlabhq,allysonbarros/gitlabhq,yatish27/gitlabhq,jrjang/gitlabhq,shinexiao/gitlabhq,iiet/iiet-git,Soullivaneuh/gitlabhq,iiet/iiet-git,martijnvermaat/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,LUMC/gitlabhq,martijnvermaat/gitlabhq,duduribeiro/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,ttasanen/gitlabhq,mrb/gitlabhq,ttasanen/gitlabhq,Soullivaneuh/gitlabhq,htve/GitlabForChinese,t-zuehlsdorff/gitlabhq,dwrensha/gitlabhq,shinexiao/gitlabhq,mrb/gitlabhq,daiyu/gitlab-zh,iiet/iiet-git,screenpages/gitlabhq,Datacom/gitlabhq,dwrensha/gitlabhq,ttasanen/gitlabhq,screenpages/gitlabhq,ttasanen/gitlabhq,allysonbarros/gitlabhq,darkrasid/gitlabhq,jrjang/gitlab-ce,dplarson/gitlabhq,mr-dxdy/gitlabhq,shinexiao/gitlabhq,duduribeiro/gitlabhq,jirutka/gitlabhq,SVArago/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,mmkassem/gitlabhq,screenpages/gitlabhq,openwide-java/gitlabhq,icedwater/gitlabhq,stoplightio/gitlabhq,allysonbarros/gitlabhq,martijnvermaat/gitlabhq,icedwater/gitlabhq,Datacom/gitlabhq,yatish27/gitlabhq