Remove outdated suggestion to declare equals as extension
Remove outdated suggestion to declare equals as extension

See http://stackoverflow.com/questions/33758880/can-i-add-operators-to-existing-classes/
belovrv/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,voddan/kotlin-web-site,meilalina/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,belovrv/kotlin-web-site,tsuijten/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,voddan/kotlin-web-site,meilalina/kotlin-web-site,TeamKotl/kotlin-web-site,hltj/kotlin-web-site-cn,voddan/kotlin-web-site,tsuijten/kotlin-web-site,madvirus/kotlin-web-site,belovrv/kotlin-web-site,JetBrains/kotlin-web-site,tsuijten/kotlin-web-site,meilalina/kotlin-web-site,madvirus/kotlin-web-site,TeamKotl/kotlin-web-site,madvirus/kotlin-web-site,TeamKotl/kotlin-web-site,hltj/kotlin-web-site-cn,meilalina/kotlin-web-site,tsuijten/kotlin-web-site,JetBrains/kotlin-web-site