[CODEOWNERS] Remove invalid owner (Azure#47846)

The focus of these changes is to remove an owner who is being flagged as no longer valid by the linter.

Author: jsquire

.github/CODEOWNERS

@@ -581,7 +581,7 @@
 
 # ServiceLabel: %KeyVault
 # AzureSdkOwners:                                                  @JonathanCrd
-# ServiceOwners:                                                   @RandalliLama @jlichwa
+# ServiceOwners:                                                   @RandalliLama
 
 # ServiceLabel: %Kubernetes Configuration
 # ServiceOwners:                                                   @NarayanThiru