Removed Chipkit from soctools

.gitmodules

-[submodule "tools/chipkit_flow"]
-	path = tools/chipkit_flow
-	url = https://git.soton.ac.uk/soclabs/chipkit_flow.git
-	branch = main

projbranch

-#-----------------------------------------------------------------------------
-# SoC Labs Sub repository branch setup
-# A joint work commissioned on behalf of SoC Labs, under Arm Academic Access license.
-#
-# Contributors
-#
-# David Mapstone (d.a.mapstone@soton.ac.uk)
-#
-# Copyright  2023, SoC Labs (www.soclabs.org)
-#-----------------------------------------------------------------------------
-# Each Repo needs to have its branch set manually in here - they will defaultly be checked out to main
-
-tools/chipkit_flow: main
\ No newline at end of file

chipkit_flow @ 67241692

-Subproject commit 672416929813708f48e5376c8de00a4f7a69aa9a