remove unused helpers file

test/helpers.exp

@@ -1,67 +0,0 @@
-#!/usr/bin/env expect
-
-set exit_code 2
-
-proc test_clean_up {} {
-  exec "tmux kill-session -t test";
-  sleep 0.5;
-}
-
-proc exec {cmd} {
-  sleep 0.5;
-  send "$cmd";
-  sleep 0.5;
-  send "\r";
-  sleep 0.5;
-}
-
-proc tmux_send {key} {
-  global tmux_prefix;
-  sleep 0.5;
-  send $tmux_prefix;
-  sleep 0.5;
-  send "$key";
-  sleep 0.5;
-}
-
-proc init_pane {} {
-  tmux_send "c";
-  exec "export PS1='# '; clear";
-}
-
-proc init_pane_fish {} {
-  tmux_send "c";
-  exec "function fish_prompt; echo '# '; end"
-  exec "clear"
-}
-
-proc invoke_fingers {} {
-  tmux_send "F";
-  sleep 1.0;
-}
-
-proc echo_yanked {} {
-  exec "clear";
-  send "echo yanked text is ";
-  tmux_send "]";
-  send "\r";
-  sleep 0.5;
-}
-
-proc tmux_paste {} {
-  tmux_send "]";
-  sleep 0.5;
-}
-
-proc exit_ok {} {
-  global exit_code
-  set exit_code 0;
-  test_clean_up;
-}
-
-proc exit_fail {} {
-  global exit_code
-  set exit_code 1;
-  exec "tmux list-buffers >> ./spec-output.log"
-  test_clean_up;
-}