Clean up config and get preferred shade of gray.

Grays have been renamed:
warmGray -> stone

tailwindlabs/tailwindcss#5384

https://tailwindcss.com/blog/tailwindcss-v3#every-color-out-of-the-box

https://tailwindcss.com/docs/customizing-colors#aliasing-color-names

Author: trey

theme/static_src/tailwind.config.js

@@ -1,55 +1,21 @@
-/**
- * This is a minimal config.
- *
- * If you need the full config, get it from here:
- * https://unpkg.com/browse/tailwindcss@latest/stubs/defaultConfig.stub.js
- */
+const colors = require('tailwindcss/colors');
 
 module.exports = {
   content: [
-    /**
-     * HTML. Paths to Django template files that will contain Tailwind CSS classes.
-     */
-
-    /*  Templates within theme app (<tailwind_app_name>/templates), e.g. base.html. */
-    '../templates/**/*.html',
-
-    /*
-     * Main templates directory of the project (BASE_DIR/templates).
-     * Adjust the following line to match your project structure.
-     */
+    // (BASE_DIR/templates)
     '../../templates/**/*.html',
 
-    /*
-     * Templates in other django apps (BASE_DIR/<any_app_name>/templates).
-     * Adjust the following line to match your project structure.
-     */
+    // (BASE_DIR/<any_app_name>/templates)
     '../../**/templates/**/*.html',
-
-    /**
-     * JS: If you use Tailwind CSS in JavaScript, uncomment the following lines and make sure
-     * patterns match your project structure.
-     */
-    /* JS 1: Ignore any JavaScript in node_modules folder. */
-    // '!../../**/node_modules',
-    /* JS 2: Process all JavaScript files in the project. */
-    // '../../**/*.js',
-
-    /**
-     * Python: If you use Tailwind CSS classes in Python, uncomment the following line
-     * and make sure the pattern below matches your project structure.
-     */
-    // '../../**/*.py'
   ],
   theme: {
-    extend: {},
+    extend: {
+      colors: {
+        gray: colors.stone,
+      }
+    },
   },
   plugins: [
-    /**
-     * '@tailwindcss/forms' is the forms plugin that provides a minimal styling
-     * for forms. If you don't like it or have own styling for forms,
-     * comment the line below to disable '@tailwindcss/forms'.
-     */
     require('@tailwindcss/forms'),
     require('@tailwindcss/typography'),
     require('@tailwindcss/line-clamp'),