ci: remove gnu-getopt usage

This is used for argument parsing in the retry script, however we don't
use the script with any arguments. So remove the unused code, and the
dependency on gnu-getopt.

This came up in the context of adding new CI jobs, where gnu-getopt
might not be available, or working properly. It seemed easier to just
remove the unused code, than look for more workarounds.

ci/retry/retry

@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
 
-GETOPT_BIN=$IN_GETOPT_BIN
-GETOPT_BIN=${GETOPT_BIN:-getopt}
-
 __sleep_amount() {
   if [ -n "$constant_sleep" ]; then
     sleep_time=$constant_sleep
@@ -71,93 +68,10 @@ retry()
   exit $return_code
 }
 
-# If we're being sourced, don't worry about such things
-if [ "$BASH_SOURCE" == "$0" ]; then
-  # Prints the help text
-  help()
-  {
-    local retry=$(basename $0)
-    cat <<EOF
-Usage: $retry [options] -- execute command
-    -h, -?, --help
-    -v, --verbose                    Verbose output
-    -t, --tries=#                    Set max retries: Default 10
-    -s, --sleep=secs                 Constant sleep amount (seconds)
-    -m, --min=secs                   Exponential Backoff: minimum sleep amount (seconds): Default 0.3
-    -x, --max=secs                   Exponential Backoff: maximum sleep amount (seconds): Default 60
-    -f, --fail="script +cmds"        Fail Script: run in case of final failure
-EOF
-  }
-
-  # show help for no arguments if stdin is a terminal
-  if { [ -z "$1" ] && [ -t 0 ] ; } || [ "$1" == '-h' ] || [ "$1" == '-?' ] || [ "$1" == '--help' ]
-  then
-    help
-    exit 0
-  fi
-
-  $GETOPT_BIN --test > /dev/null
-  if [[ $? -ne 4 ]]; then
-      echo "I’m sorry, 'getopt --test' failed in this environment. Please load GNU getopt."
-      exit 1
-  fi
-
-  OPTIONS=vt:s:m:x:f:
-  LONGOPTIONS=verbose,tries:,sleep:,min:,max:,fail:
-
-  PARSED=$($GETOPT_BIN --options="$OPTIONS" --longoptions="$LONGOPTIONS" --name "$0" -- "$@")
-  if [[ $? -ne 0 ]]; then
-    # e.g. $? == 1
-    #  then getopt has complained about wrong arguments to stdout
-    exit 2
-  fi
-  # read getopt’s output this way to handle the quoting right:
-  eval set -- "$PARSED"
-
   max_tries=10
   min_sleep=0.3
   max_sleep=60.0
   constant_sleep=
   fail_script=
 
-  # now enjoy the options in order and nicely split until we see --
-  while true; do
-      case "$1" in
-          -v|--verbose)
-              VERBOSE=true
-              shift
-              ;;
-          -t|--tries)
-              max_tries="$2"
-              shift 2
-              ;;
-          -s|--sleep)
-              constant_sleep="$2"
-              shift 2
-              ;;
-          -m|--min)
-              min_sleep="$2"
-              shift 2
-              ;;
-          -x|--max)
-              max_sleep="$2"
-              shift 2
-              ;;
-          -f|--fail)
-              fail_script="$2"
-              shift 2
-              ;;
-          --)
-              shift
-              break
-              ;;
-          *)
-              echo "Programming error"
-              exit 3
-              ;;
-      esac
-  done
-
   retry "$max_tries" "$min_sleep" "$max_sleep" "$constant_sleep" "$fail_script" "$@"
-
-fi