remove unneeded dependency from bevy_render (#19794)

# Objective

- yeet cruft

## Solution

- yeet cruft

## Testing

- cargo clippy

crates/bevy_render/Cargo.toml

@@ -28,7 +28,7 @@ compressed_image_saver = ["bevy_image/compressed_image_saver"]
 basis-universal = ["bevy_image/basis-universal"]
 exr = ["bevy_image/exr"]
 hdr = ["bevy_image/hdr"]
-ktx2 = ["dep:ktx2", "bevy_image/ktx2"]
+ktx2 = ["bevy_image/ktx2"]
 
 multi_threaded = ["bevy_tasks/multi_threaded"]
 
@@ -104,7 +104,6 @@ downcast-rs = { version = "2", default-features = false, features = ["std"] }
 thiserror = { version = "2", default-features = false }
 derive_more = { version = "1", default-features = false, features = ["from"] }
 futures-lite = "2.0.1"
-ktx2 = { version = "0.4.0", optional = true }
 encase = { version = "0.10", features = ["glam"] }
 # For wgpu profiling using tracing. Use `RUST_LOG=info` to also capture the wgpu spans.
 profiling = { version = "1", features = [