cipd: ignore .cipd_client_root

It was introduced to override the cipd bin path so that the downloaded
files wouldn't be listed in the CiderG workspace file tree when
the bundled depot_tools is used.

However,
- chromium no longer uses the bundled depot_tools
- the cipd_client_root, pointing to a folder in /tmp, causes issues
when a temp cleanup cron removes files based on the last access ts.

We no longer need .cipd_client_root.

Bug: 415080055
Change-Id: Ic966699cce3173a8ce4033752edec5e53aded870
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6614519
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Commit-Queue: Scott Lee <ddoman@chromium.org>

cipd

@@ -91,12 +91,6 @@ CIPD_BACKEND="https://chrome-infra-packages.appspot.com"
 VERSION_FILE="${DEPOT_TOOLS_DIR}/cipd_client_version"
 
 CIPD_ROOT="${DEPOT_TOOLS_DIR}"
-# value in .cipd_client_root file overrides the default root.
-CIPD_ROOT_OVERRIDE_FILE="${DEPOT_TOOLS_DIR}/.cipd_client_root"
-if [ -f "${CIPD_ROOT_OVERRIDE_FILE}" ]; then
-  CIPD_ROOT=$(<"${CIPD_ROOT_OVERRIDE_FILE}")
-  mkdir -p "${CIPD_ROOT}"
-fi
 CLIENT="${CIPD_ROOT}/.cipd_client"
 PLATFORM="${OS}-${ARCH}"
 

cipd_bin_setup.sh

@@ -15,12 +15,6 @@ function cipd_bin_setup {
         ;;
     esac
 
-    # value in .cipd_client_root file overrides the default root.
-    CIPD_ROOT_OVERRIDE_FILE="${MYPATH}/.cipd_client_root"
-    if [ -f "${CIPD_ROOT_OVERRIDE_FILE}" ]; then
-        ROOT=$(<"${CIPD_ROOT_OVERRIDE_FILE}")
-    fi
-
     (
     source "$MYPATH/cipd" ensure \
         -log-level warning \