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diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java b/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java
deleted file mode 100644
index d5a4058b3e..0000000000
--- a/support/arara/source/src/main/java/com/github/cereda/arara/utils/UnsafeUtils.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the project's author nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.utils;
-
-import com.github.cereda.arara.model.Command;
-import com.github.cereda.arara.model.Pair;
-import org.zeroturnaround.exec.ProcessExecutor;
-import org.zeroturnaround.exec.ProcessResult;
-
-/**
- * Implements unsafe utilitary methods.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class UnsafeUtils {
-
- /**
- * Executes a system command from the underlying operating system and
- * returns a pair containing the exit status and the command output as a
- * string.
- * @param command The system command to be executed.
- * @return A pair containing the exit status and the system command output
- * as a string.
- */
- public static Pair<Integer, String> executeSystemCommand(Command command) {
-
- try {
-
- // create a process result with the provided
- // command, capturing the output
- ProcessResult result = new ProcessExecutor(
- command.getElements()
- ).readOutput(true).execute();
-
- // return the pair containing the exit status
- // and the output string as UTF-8
- return new Pair<Integer, String>(
- result.getExitValue(),
- result.outputUTF8()
- );
-
- } catch (Exception exception) {
-
- // quack, quack, do nothing, just
- // return a default error code
-
- // if something goes wrong, the default
- // error branch returns an exit status of
- // -99 and an empty string
- return new Pair<Integer, String>(-99, "");
-
- }
- }
-
-}