Refactored Theme class to correspond SOLID patterns

scripts/utils/__init__.py

@@ -1,8 +1,5 @@
-from .concatenate_files import concatenate_files
 from .copy_files import copy_files
-from .destinaiton_return import destination_return
 from .generate_file import generate_file
-from .hex_to_rgba import hex_to_rgba
 from .remove_files import remove_files
 from .remove_keywords import remove_keywords
 from .remove_properties import remove_properties