Remove duplicate definitions in ghe-backup-config (#480)

While investigating an unrelated issue, I noticed that some definitions
in ghe-backup-config are present twice. The reason for this appears to
be a faulty merge conflict resolution [1], as both parent commits [2, 3]
only have a single copy of these definitions but the merge commit has
duplicates. It seems that an unwieldy conflict came up while merging the
progress-indicator with the master branch, as a result of which both the
old and new locations of these definitions were accidentally kept,
causing the duplication.

This removes one copy of each definition to avoid confusion and
potential future bugs.

[1] 1eaf809
[2] a8e7eca
[3] 8aaccc3

Author: pluehne

share/github-backup-utils/ghe-backup-config

@@ -35,7 +35,7 @@ if [ -n "$GHE_SHOW_VERSION" ]; then
 fi
 
 # Check for "--help|-h" in args or GHE_SHOW_HELP=true and show usage
-# shellcheck disable=SC2120 # the script name is always referenced
+# shellcheck disable=SC2120 # Our arguments are optional and not meant to be the owning script's
 print_usage() {
   grep '^#/' <"$0" | cut -c 4-
   exit "${1:-1}"
@@ -51,10 +51,6 @@ else
   done
 fi
 
-# Add the bin and share/github-backup-utils dirs to PATH
-PATH="$GHE_BACKUP_ROOT/bin:$GHE_BACKUP_ROOT/share/github-backup-utils:$PATH"
-# shellcheck source=share/github-backup-utils/bm.sh
-. "$GHE_BACKUP_ROOT/share/github-backup-utils/bm.sh"
 # Save off GHE_HOSTNAME from the environment since we want it to override the
 # backup.config value when set.
 GHE_HOSTNAME_PRESERVE="$GHE_HOSTNAME"
@@ -150,35 +146,6 @@ log_ssh(){
   log_level "ssh" "$1"
 }
 
-# Assume this script lives in share/github-backup-utils/ when setting the root
-GHE_BACKUP_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
-
-# Get the version from the version file.
-BACKUP_UTILS_VERSION="$(cat "$GHE_BACKUP_ROOT/share/github-backup-utils/version")"
-
-# If a version check was requested, show the current version and exit
-if [ -n "$GHE_SHOW_VERSION" ]; then
-  echo "GitHub backup-utils v$BACKUP_UTILS_VERSION"
-  exit 0
-fi
-
-# Check for "--help|-h" in args or GHE_SHOW_HELP=true and show usage
-# shellcheck disable=SC2120 # Our arguments are optional and not meant to be the owning script's
-print_usage() {
-  grep '^#/' <"$0" | cut -c 4-
-  exit "${1:-1}"
-}
-
-if [ -n "$GHE_SHOW_HELP" ]; then
-  print_usage
-else
-  for a in "$@"; do
-    if [ "$a" = "--help" ] || [ "$a" = "-h" ]; then
-      print_usage
-    fi
-  done
-fi
-
 # Add the bin and share/github-backup-utils dirs to PATH
 PATH="$GHE_BACKUP_ROOT/bin:$GHE_BACKUP_ROOT/share/github-backup-utils:$PATH"
 # shellcheck source=share/github-backup-utils/bm.sh
@@ -187,9 +154,6 @@ PATH="$GHE_BACKUP_ROOT/bin:$GHE_BACKUP_ROOT/share/github-backup-utils:$PATH"
 . "$GHE_BACKUP_ROOT/share/github-backup-utils/ghe-incremental-backup-restore"
 # shellcheck source=share/github-backup-utils/track-progress
 . "$GHE_BACKUP_ROOT/share/github-backup-utils/track-progress"
-# Save off GHE_HOSTNAME from the environment since we want it to override the
-# backup.config value when set.
-GHE_HOSTNAME_PRESERVE="$GHE_HOSTNAME"
 
 
 ghe_restore_check() {