memory leak in "rmt"

[LucasBornhauser]

Describe the bug
Removing content from file using the "rmt" command leads to memory leak

To Reproduce
Steps to reproduce the behavior:

1. Command:

• valgrind -v --leak-check=full ./bin/linux/docxbox rmt test/assets/documents/docx/cp_table_unordered_list_images.docx "Fugiat" "."

2. Resources: cp_table_unordered_list_images.docx

Expected behavior
No memory leak

Environment:

• docxBox Version: 1.0.1

mem-leak.log

[kstenschke]

Please recheck, the memory leaks should be fixed as of 1cb49fa