diff --git a/src/lib/script.sh b/src/lib/script.sh
deleted file mode 100644
index 8599ab0..0000000
--- a/src/lib/script.sh
+++ /dev/null
@@ -1,105 +0,0 @@
-#! /usr/bin/env bash
-
-# script.sh - utilitary functions.
-# Copyright (c) 2022 ge <https://nixhacks.net/>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-validate_sources() {
-    # Check sources array.
-    #
-    # Usage: validate_sources ARRAY
-
-    # Allowed URI schemes: file, mysql postgres, sqlite
-    # No required schemes.
-
-    local array=("$@")
-    local scheme=
-
-    for uri in "${array[@]}"; do
-        scheme="${uri%%:*}"
-        case "$scheme" in
-            file|mysql|postgres|sqlite) : ;; # do nothing, this is OK
-            *) echo "Error: Unsupported URI scheme: $scheme" >&2; exit 1;;
-        esac
-    done
-}
-
-validate_targets() {
-    # Check targets array and set local_target variable.
-    #
-    # Usage: validate_targets ARRAY
-
-    # Allowed URI schemes: file, ftp, sftp, rsync, s3, swift, sj, dav, davs
-    # Required schemes (one or more times): file
-
-    local array=("$@")
-    local scheme=
-    local file_targets=()
-
-    for uri in "${array[@]}"; do
-        scheme="${uri%%:*}"
-        case "$scheme" in
-            file|ftp|sftp|rsync|s3|swift|sj|dav|davs)
-                if [[ "$scheme" == file ]]; then
-                    file_targets+=("$uri")
-                fi
-            ;;
-            *) echo "Error: Unsupported URI scheme: $scheme" >&2; exit 1;;
-        esac
-    done
-
-    if [ "${#file_targets[@]}" -eq 0 ]; then
-        echo "Error: 'file' scheme is not set in targets." \
-            "You must provide one or more targets with 'file' scheme." >&2
-        exit 1
-    else
-        # Set local_target. This variable contains path to save local backups.
-        # Files to additional targets will be coped from this directory.
-        local_target="${file_targets[0]}"
-    fi
-}
-
-source_script() {
-    # Safely as possible source backup script.
-    #
-    # Usage: source_script SCRIPT
-
-    local script="$1"
-
-    if ! test -f "$script"; then
-        echo "Error: No such file: $script" >&2; exit 1
-    fi
-
-    # Dry run script, check syntax. See set(1p)
-    if ! bash -n "$script"; then
-        echo Error: Please check your syntax >&2; exit 1
-    fi
-
-    # Source script
-    . "$@"
-
-    # Check required variables
-    if [[ "$sources" ]]; then
-        validate_sources "${sources[@]}"
-    else
-        echo Error: sources array is not set >&2; exit 1
-    fi
-
-    if [[ "$targets" ]]; then
-        validate_targets "${targets[@]}"
-    else
-        echo Error: targets array is not set >&2; exit 1
-    fi
-}