fix(build): remove old configration files for postcss and tailwind in (#2803)

## Description:

fix(build): remove old configration files for postcss and tailwind in
docker builds and eslint config

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

wraith4081

Dockerfile

@@ -13,8 +13,6 @@ RUN --mount=type=cache,target=/root/.npm \
 # Copy only what's needed for build
 COPY tsconfig.json ./
 COPY vite.config.ts ./
-COPY tailwind.config.js ./
-COPY postcss.config.js ./
 COPY eslint.config.js ./
 COPY index.html ./
 COPY resources ./resources

eslint.config.js

@@ -26,8 +26,6 @@ export default [
           allowDefaultProject: [
             "__mocks__/fileMock.js",
             "eslint.config.js",
-            "postcss.config.js",
-            "tailwind.config.js",
             "scripts/sync-assets.mjs",
           ],
         },