Update snappi-sonic.yml (sonic-net#19676)

Removing secret_group_var variable. We don't need this. If not it will give key error for api_server.

Description of PR
Removing secre_group_vars variable from snappi-sonic.yml file.

Summary:
Fixes # (issue)
Removed the variable.

Type of change
[ x] Bug fix
 Testbed and Framework(new/improvement)
 New Test case
 Skipped for non-supported platforms
 Test case improvement

Approach
What is the motivation for this PR?
How did you do it?
How did you verify/test it?
Ran after removing the variable and it works fine.

signed-off-by: [email protected]
Signed-off-by: Guy Shemesh <[email protected]>

Author: kamalsahu0001

ansible/group_vars/snappi-sonic/snappi-sonic.yml

@@ -47,4 +47,4 @@ bgp_slb_passive_range: 10.255.0.0/25
 fanout_admin_user: "fanoutadminuser"
 fanout_admin_password: "fanoutadminpassword"
 
-secret_group_vars: {snappi_api_server: {user: admin, password: admin, rest_port: 443, session_id: "None"}}
+snappi_api_server: {user: admin, password: admin, rest_port: 443, session_id: "None"}