remove extra unused variable

Author: Ninja3047

cookiecutter.json

@@ -7,7 +7,6 @@
     "project_slug": "{{ (cookiecutter.__project_namespace_slug + '-' if cookiecutter.project_namespace_import else '') + cookiecutter.__module_slug }}",
     "__project_import": "{{ (cookiecutter.project_namespace_import + '.' if cookiecutter.project_namespace_import else '') + cookiecutter.__module_import }}",
     "__project_src_path": "src/{{ cookiecutter.__project_import.replace('.', '/') }}",
-    "__project_src_first": "{{ ('src/' + cookiecutter.project_namespace_import.split('.')[0] if cookiecutter.project_namespace_import else 'src/' + cookiecutter.__module_import) }}",
     "project_description": "",
     "repo_type": [
         "CLI",