chore: deleting unused RPC messages

Author: Pranav Firake

core/aws-lsp-core/src/credentials/credentialsProvider.ts

@@ -30,24 +30,6 @@ export const credentialsProtocolMethodNames = {
      * Called by host to un-set any stored bearer token
      */
     iamBearerTokenDelete: 'aws/credentials/token/delete',
-    /**
-     * Called by host to push new IAM credentials whenever credentials state changes for Atx
-     * (and there are valid credentials)
-     */
-    iamAtxCredentialsUpdate: 'aws/credentials/iam/atxupdate',
-    /**
-     * Called by host to un-set any stored IAM credentials for Atx
-     */
-    iamAtxCredentialsDelete: 'aws/credentials/iam/atxdelete',
-    /**
-     * Called by host to push a new bearer token whenever credentials state changes for Atx
-     * (and there is a valid token)
-     */
-    iamAtxBearerTokenUpdate: 'aws/credentials/token/atxupdate',
-    /**
-     * Called by host to un-set any stored bearer token for Atx
-     */
-    iamAtxBearerTokenDelete: 'aws/credentials/token/atxdelete',
 }
 
 /**