Update AMD Maintainers

Removing former AMD Maintainers. Will create a follow-up PR to include future maintainers.

Signed-Off-By: Adithya Krishnan Kannan <AdithyaKrishnan.Kannan@amd.com>

Author: AdithyaKrishnan

maintainers.yml

@@ -59,7 +59,7 @@ mappings:
         slack: "fupan li"
         github: "lifupan"
 
-# @kata-containers/amd: AdithyaKrishnan, arvindskumar99
+# @kata-containers/amd: AdithyaKrishnan
   - regex: ".*(qemu-(sev(-snp)?|snp(-experimental)?)|ovmf(-sev)?).*"
     group: "AMD"
     owners:
@@ -69,12 +69,6 @@ mappings:
         slack: "Adi"
         github: "AdithyaKrishnan"
 
-      - fullname: "Arvind Kumar"
-        email: "arvind.kumar@amd.com"
-        slackurl: "https://cloud-native.slack.com/team/U06HXU0312P"
-        slack: "Arvind Kumar"
-        github: "arvindskumar99"
-
 # Steve and Wainer to maintain the non-tee CoCo jobs
   - regex: ".*coco-nontee.*"
     group: "CoCo_non-TEE"