Stop building Windows with Freetype on the CI

Windows with Freetype is a really unusual combination and the bundled build is
currently broken in `freetype-sys` (see #270). Just building a normal
bundled build should allow us to upgrade to the latest version of
`freetype-sys`.

Author: mrobinson

.github/workflows/main.yml

@@ -134,10 +134,10 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cargo build
-        run: cargo build --workspace --features "freetype-sys/bundled bundled"
+        run: cargo build --workspace --features "bundled"
 
       - name: Cargo test
-        run: cargo test --workspace --features "freetype-sys/bundled bundled"
+        run: cargo test --workspace --features "bundled"
         env:
           RUST_BACKTRACE: 1