zproject: Remove unused template tags minified_js, static.

`minified_js` was obsoleted by the Webpack migration and `static` has
never been used.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

docs/overview/directory-structure.md

@@ -160,11 +160,6 @@ This is used to deploy essentially all configuration in production.
 
 * `zproject/jinja2/__init__.py` Jinja2 environment.
 
-* `zproject/jinja2/backends.py` Jinja2 backend.
-
-* `zproject/jinja2/compressors.py` Jinja2 compatible functions of
-   Django-Pipeline.
-
 -----------------------------------------------------------------------
 
 ### Translation files

zerver/templatetags/minified_js.py

@@ -1,29 +0,0 @@
-from typing import Any, Dict
-
-from django.conf import settings
-from django.contrib.staticfiles.storage import staticfiles_storage
-from django.template import Library, Node
-
-
-register = Library()
-
-class MinifiedJSNode(Node):
-    def __init__(self, sourcefile: str, csp_nonce: str) -> None:
-        self.sourcefile = sourcefile
-        self.csp_nonce = csp_nonce
-
-    def render(self, context: Dict[str, Any]) -> str:
-        if settings.DEBUG:
-            source_files = settings.JS_SPECS[self.sourcefile]
-            normal_source = source_files['source_filenames']
-            minified_source = source_files.get('minifed_source_filenames', [])
-
-            # Minified source files (most likely libraries) should be loaded
-            # first to prevent any dependency errors.
-            scripts = minified_source + normal_source
-        else:
-            scripts = [settings.JS_SPECS[self.sourcefile]['output_filename']]
-        script_urls = [staticfiles_storage.url(script) for script in scripts]
-        script_tags = ['<script nonce="%s" src="%s"></script>' % (self.csp_nonce, url)
-                       for url in script_urls]
-        return '\n'.join(script_tags)

zproject/jinja2/__init__.py

@@ -1,7 +1,6 @@
 
 from typing import Any
 
-from django.contrib.staticfiles.storage import staticfiles_storage
 from django.template.defaultfilters import slugify, pluralize
 from django.urls import reverse
 from django.utils import translation
@@ -9,17 +8,14 @@ from django.utils.timesince import timesince
 from jinja2 import Environment
 from two_factor.templatetags.two_factor import device_action
 
-from .compressors import minified_js
 from zerver.templatetags.app_filters import display_list, render_markdown_path
 
 
 def environment(**options: Any) -> Environment:
     env = Environment(**options)
     env.globals.update({
-        'static': staticfiles_storage.url,
         'url': reverse,
         'render_markdown_path': render_markdown_path,
-        'minified_js': minified_js,
     })
 
     env.install_gettext_translations(translation, True)

zproject/jinja2/compressors.py

@@ -1,16 +0,0 @@
-"""
-`minified_js` is taken from `zerver.templatetags.minified_js.py`
-"""
-
-from django.conf import settings
-from django.template import TemplateSyntaxError
-
-from zerver.templatetags.minified_js import MinifiedJSNode
-
-
-def minified_js(sourcefile: str, csp_nonce: str) -> str:
-    if sourcefile not in settings.JS_SPECS:
-        raise TemplateSyntaxError(
-            "Invalid argument: no JS file %s".format(sourcefile))
-
-    return MinifiedJSNode(sourcefile, csp_nonce).render({})