chore: dead code & stale comments

src/renderer/Metal.zig

@@ -275,7 +275,6 @@ pub inline fn bufferOptions(self: Metal) bufferpkg.Options {
     };
 }
 
-pub const instanceBufferOptions = bufferOptions;
 pub const uniformBufferOptions = bufferOptions;
 pub const fgBufferOptions = bufferOptions;
 pub const bgBufferOptions = bufferOptions;

src/renderer/OpenGL.zig

@@ -344,7 +344,6 @@ pub inline fn bufferOptions(self: OpenGL) bufferpkg.Options {
     };
 }
 
-pub const instanceBufferOptions = bufferOptions;
 pub const uniformBufferOptions = bufferOptions;
 pub const fgBufferOptions = bufferOptions;
 pub const bgBufferOptions = bufferOptions;

src/renderer/opengl/Pipeline.zig

@@ -20,7 +20,7 @@ pub const Options = struct {
     /// Whether to enable blending.
     blending_enabled: bool = true,
 
-    /// Optional texture buffer binding for `buffers[1]`.
+    /// Texture buffer binding for `buffers[1]`.
     buffer_texture: ?BufferTexture = null,
 
     pub const BufferTexture = struct {

src/renderer/opengl/RenderPass.zig

@@ -104,13 +104,7 @@ pub fn step(self: *Self, s: Step) void {
     if (s.pipeline.buffer_texture) |tbo| {
         gl.Texture.active(tbo.unit) catch return;
         const tbind = tbo.texture.bind(.Buffer) catch return;
-
-        if (s.buffers.len > 1 and s.buffers[1] != null) {
-            tbind.buffer(tbo.internal_format, s.buffers[1].?.id) catch return;
-        } else {
-            // Detach to avoid stale bindings from prior draws.
-            tbind.buffer(tbo.internal_format, 0) catch return;
-        }
+        tbind.buffer(tbo.internal_format, s.buffers[1].?.id) catch return;
     }
 
     // Bind relevant samplers.

src/renderer/opengl/shaders.zig

@@ -91,7 +91,7 @@ const PipelineCollection = t: {
     } });
 };
 
-/// This contains the state for the shaders used by the Metal renderer.
+/// This contains the state for the shaders used by the OpenGL renderer.
 pub const Shaders = struct {
     /// Collection of available render pipelines.
     pipelines: PipelineCollection,