Cleanup dead code (#8939)

- Used for old UI plugins
- No longer referenced

src/backend/InvenTree/plugin/helpers.py

@@ -10,7 +10,6 @@ import traceback
 from importlib.metadata import entry_points
 from importlib.util import module_from_spec
 
-from django import template
 from django.conf import settings
 from django.core.exceptions import AppRegistryNotReady
 from django.db.utils import IntegrityError
@@ -244,35 +243,3 @@ def get_plugins(pkg, baseclass, path=None):
 
 
 # endregion
-
-
-# region templates
-def render_template(plugin, template_file, context=None):
-    """Locate and render a template file, available in the global template context."""
-    try:
-        tmp = template.loader.get_template(template_file)
-    except template.TemplateDoesNotExist:
-        logger.exception(
-            "Plugin %s could not locate template '%s'", plugin.slug, template_file
-        )
-
-        return f"""
-        <div class='alert alert-block alert-danger'>
-        Template file <em>{template_file}</em> does not exist.
-        </div>
-        """
-
-    # Render with the provided context
-    html = tmp.render(context)
-
-    return html
-
-
-def render_text(text, context=None):
-    """Locate a raw string with provided context."""
-    ctx = template.Context(context)
-
-    return template.Template(text).render(ctx)
-
-
-# endregion

src/backend/InvenTree/plugin/test_helpers.py

@@ -1,26 +0,0 @@
-"""Unit tests for helpers.py."""
-
-from django.test import TestCase
-
-from .helpers import render_template
-
-
-class HelperTests(TestCase):
-    """Tests for helpers."""
-
-    def test_render_template(self):
-        """Check if render_template helper works."""
-
-        class ErrorSource:
-            slug = 'sampleplg'
-
-        # working sample
-        response = render_template(ErrorSource(), 'sample/sample.html', {'abc': 123})
-        self.assertEqual(response, '<h1>123</h1>\n')
-
-        # Wrong sample
-        response = render_template(
-            ErrorSource(), 'sample/wrongsample.html', {'abc': 123}
-        )
-        self.assertIn('lert alert-block alert-danger', response)
-        self.assertIn('Template file <em>sample/wrongsample.html</em>', response)