Arm backend: Remove unused github ci git setup

Setup.sh has changed how things are installed and a git user is not
needed anymore.

Signed-off-by: Zingo Andersen <[email protected]>
Change-Id: Ia2c212f55742ff5b61a1a2c658e574a5b441720c

Author: zingo

.ci/scripts/setup-arm-baremetal-tools.sh

@@ -1,11 +1,10 @@
 #!/bin/bash
-# Copyright 2024 Arm Limited and/or its affiliates.
+# Copyright 2024-2025 Arm Limited and/or its affiliates.
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
 # NB: This function could be used to install Arm dependencies
 # Setup arm example environment (including TOSA tools)
-git config --global user.email "[email protected]"
-git config --global user.name "Github Executorch"
+
 bash examples/arm/setup.sh --i-agree-to-the-contained-eula