Remove unused auxiliary script task_functions.sh

The definitions contained in this file were used only by the already
removed 'context' bash script, see: fc6507803b

scripts/bash/task_functions.sh

@@ -1,26 +0,0 @@
-CONFIRM_PROMPT='are you sure'
-task_config ()
-{
-    var="${1}"
-    shift
-    value="${@}"
-    echo y | task config $var "$value" | grep -iv "$CONFIRM_PROMPT"
-}
-task_vars ()
-{
-    task _show | grep "^.*${1}.*=" | cut -d'=' -f1
-}
-task_get ()
-{
-    task _show | grep "^${1}=" | cut -d'=' -f2
-}
-task_color ()
-{
-    color="${1}"
-    shift
-    text="${@}"
-    task rc.verbose=nothing rc._forcecolor=yes color ${color} | grep 'task color' | \
-       tail -n 1 | sed -e 's/^  //' -e "s/task color ${color}/${text}/"
-}
-
-