Remove Lightbend CLA from Mergify configuration

[ihostage]

⚠️ Also need remove CLA from webhook and branch protection rules in GH settings ⚠️

• [x] playframework https://github.com/playframework/playframework/pull/11424

• [x] playframework.com https://github.com/playframework/playframework.com/pull/505

• [x] interplay https://github.com/playframework/interplay/pull/209

• [x] play-doc https://github.com/playframework/play-doc/pull/152

• [x] play-ebean https://github.com/playframework/play-ebean/pull/317

• [x] play-file-watch https://github.com/playframework/play-file-watch/pull/181 https://github.com/playframework/play-file-watch/pull/182

• [x] play-grpc https://github.com/playframework/play-grpc/pull/433

• [x] play-json https://github.com/playframework/play-json/pull/792

• [x] play-mailer https://github.com/playframework/play-mailer/pull/222

• [x] play-samples https://github.com/playframework/play-samples/pull/175

• [x] play-slick https://github.com/playframework/play-slick/pull/692

• [x] play-soap https://github.com/playframework/play-soap/pull/318

• [x] play-socket.io https://github.com/playframework/play-socket.io/pull/235

• [x] play-webgoat https://github.com/playframework/play-webgoat/pull/68

• [x] play-ws https://github.com/playframework/play-ws/pull/699

• [x] cachecontrol https://github.com/playframework/cachecontrol/pull/234

• [x] omnidoc https://github.com/playframework/omnidoc/pull/206

• [x] scalatestplus-play https://github.com/playframework/scalatestplus-play/pull/372

• [x] twirl https://github.com/playframework/twirl/pull/543

• [x] play-java-seed.g8 https://github.com/playframework/play-java-seed.g8/pull/111

• [x] play-scala-seed.g8 https://github.com/playframework/play-scala-seed.g8/pull/168

[ihostage]

Done ✅

[mkurz]

Great Sergey! :partying_face: Thanks!