Revert "fall back to /tmp for LOCPATH if HOME does not exist or not writable"

This reverts commit f991c8c526.

On second thought, this makes it unbearably slow and leaves far too much
cruft behind.

standalone/linux/skel/runshell

@@ -126,13 +126,6 @@ unset LD_PRELOAD
 ORIG_LOCPATH="$LOCPATH"
 export ORIG_LOCPATH
 LOCPATH="$HOME/.cache/git-annex/locales/$(echo "$base" | tr / _ )"
-if ! mkdir -p "$LOCPATH" 2>/dev/null; then
-	tlocpath=$(mktemp -d -p /tmp annexlocalesXXXXXXXXX 2>/dev/null || true)
-	if [ -z "$tlocpath" ]; then
-		tlocpath="/tmp/annexlocales.$$"
-	fi
-	LOCPATH="$tlocpath/locales/$(echo "$base" | tr / _ )"
-fi
 export LOCPATH
 
 # Clean up locale caches when their standalone bundle no longer exists.