adopters: rm 2 case study articles (#5438)

adopters.md

@@ -12,8 +12,6 @@ This is a list of TiDB adopters in various industries.
 | :--- | :--- | :--- |
 |[China Telecom Bestpay](https://www.crunchbase.com/organization/orange-finance)|Mobile Payment|[English](https://pingcap.com/case-studies/how-we-process-data-five-times-more-efficiently-using-a-scale-out-mysql-alternative/); [Chinese](https://pingcap.com/cases-cn/user-case-bestpay/)|
 |[VNG](https://en.wikipedia.org/wiki/VNG_Corporation)|Mobile Payment|English [#1](https://pingcap.com/case-studies/tidb-at-zalopay-infrastructure-lesson-learned/), [#2](https://pingcap.com/case-studies/zalopay-using-a-scale-out-mysql-alternative-to-serve-millions-of-users)|
-|[Paytm Labs](https://www.crunchbase.com/organization/paytm-labs)|Mobile Payment|[English](https://pingcap.com/case-studies/gaining-3x-throughput-by-migrating-from-aurora-to-a-scale-out-mysql-alternative)|
-|[PayPay](https://www.crunchbase.com/organization/paypay#section-overviewy)|Mobile Payment|[English](https://pingcap.com/case-studies/japan-largest-mobile-payment-company-migrates-from-aurora-to-a-scale-out-database); [Chinese](https://pingcap.com/cases-cn/user-case-paypay/)|
 |[Ping++](https://www.crunchbase.com/organization/ping-5)|Mobile Payment|[Chinese](https://pingcap.com/cases-cn/user-case-ping++/)|
 |[LianLian Tech](https://www.crunchbase.com/organization/lianlian-pay)|Mobile Payment||
 |[U-Next](https://www.crunchbase.com/organization/u-next)|Media and Entertainment|[English](https://pingcap.com/case-studies/running-a-scale-out-database-on-arm-as-mysql-alternative/); [Chinese](https://pingcap.com/cases-cn/user-case-unext/)|