E2E

Retire the example of quickstart-xgboost-horizontal #6037

Job	Run time
Build, test and upload wheel	1m 26s
Strategy / FedMedian	1m 17s
Framework / bare	1m 37s
Strategy / FedTrimmedAvg	1m 10s
Framework / bare-https	1m 17s
Strategy / QFedAvg	1m 9s
Framework / jax	2m 13s
Strategy / FaultTolerantFedAvg	1m 8s
Framework / pytorch	2m 50s
Strategy / FedAvgM	1m 11s
Framework / tensorflow	3m 3s
Strategy / FedAdam	1m 11s
Framework / tabnet	2m 46s
Strategy / FedAdagrad	1m 8s
Framework / opacus	2m 45s
Strategy / FedYogi	1m 11s
Framework / pytorch-lightning	2m 35s
Framework / mxnet	1m 43s
Framework / scikit-learn	2m 25s
Framework / fastai	3m 54s
Framework / pandas	1m 32s
	39m 31s

Provide feedback