Remove unused push constants (#13076)

The shader code was removed in #11280, but we never cleaned up the rust
code.

crates/bevy_pbr/src/prepass/mod.rs

@@ -534,18 +534,6 @@ where
             PREPASS_SHADER_HANDLE
         };
 
-        let mut push_constant_ranges = Vec::with_capacity(1);
-        if cfg!(all(
-            feature = "webgl",
-            target_arch = "wasm32",
-            not(feature = "webgpu")
-        )) {
-            push_constant_ranges.push(PushConstantRange {
-                stages: ShaderStages::VERTEX,
-                range: 0..4,
-            });
-        }
-
         let mut descriptor = RenderPipelineDescriptor {
             vertex: VertexState {
                 shader: vert_shader_handle,
@@ -585,7 +573,7 @@ where
                 mask: !0,
                 alpha_to_coverage_enabled: false,
             },
-            push_constant_ranges,
+            push_constant_ranges: vec![],
             label: Some("prepass_pipeline".into()),
         };
 

crates/bevy_pbr/src/render/mesh.rs

@@ -1467,18 +1467,6 @@ impl SpecializedMeshPipeline for MeshPipeline {
             ));
         }
 
-        let mut push_constant_ranges = Vec::with_capacity(1);
-        if cfg!(all(
-            feature = "webgl",
-            target_arch = "wasm32",
-            not(feature = "webgpu")
-        )) {
-            push_constant_ranges.push(PushConstantRange {
-                stages: ShaderStages::VERTEX,
-                range: 0..4,
-            });
-        }
-
         Ok(RenderPipelineDescriptor {
             vertex: VertexState {
                 shader: MESH_SHADER_HANDLE,
@@ -1497,7 +1485,7 @@ impl SpecializedMeshPipeline for MeshPipeline {
                 })],
             }),
             layout: bind_group_layout,
-            push_constant_ranges,
+            push_constant_ranges: vec![],
             primitive: PrimitiveState {
                 front_face: FrontFace::Ccw,
                 cull_mode: Some(Face::Back),
@@ -1794,12 +1782,6 @@ impl<P: PhaseItem> RenderCommand<P> for DrawMesh {
         pass.set_vertex_buffer(0, gpu_mesh.vertex_buffer.slice(..));
 
         let batch_range = item.batch_range();
-        #[cfg(all(feature = "webgl", target_arch = "wasm32", not(feature = "webgpu")))]
-        pass.set_push_constants(
-            ShaderStages::VERTEX,
-            0,
-            &(batch_range.start as i32).to_le_bytes(),
-        );
         match &gpu_mesh.buffer_info {
             GpuBufferInfo::Indexed {
                 buffer,

crates/bevy_sprite/src/mesh2d/mesh.rs

@@ -517,17 +517,6 @@ impl SpecializedMeshPipeline for Mesh2dPipeline {
             true => ViewTarget::TEXTURE_FORMAT_HDR,
             false => TextureFormat::bevy_default(),
         };
-        let mut push_constant_ranges = Vec::with_capacity(1);
-        if cfg!(all(
-            feature = "webgl",
-            target_arch = "wasm32",
-            not(feature = "webgpu")
-        )) {
-            push_constant_ranges.push(PushConstantRange {
-                stages: ShaderStages::VERTEX,
-                range: 0..4,
-            });
-        }
 
         Ok(RenderPipelineDescriptor {
             vertex: VertexState {
@@ -547,7 +536,7 @@ impl SpecializedMeshPipeline for Mesh2dPipeline {
                 })],
             }),
             layout: vec![self.view_layout.clone(), self.mesh_layout.clone()],
-            push_constant_ranges,
+            push_constant_ranges: vec![],
             primitive: PrimitiveState {
                 front_face: FrontFace::Ccw,
                 cull_mode: None,
@@ -699,12 +688,6 @@ impl<P: PhaseItem> RenderCommand<P> for DrawMesh2d {
         pass.set_vertex_buffer(0, gpu_mesh.vertex_buffer.slice(..));
 
         let batch_range = item.batch_range();
-        #[cfg(all(feature = "webgl", target_arch = "wasm32", not(feature = "webgpu")))]
-        pass.set_push_constants(
-            ShaderStages::VERTEX,
-            0,
-            &(batch_range.start as i32).to_le_bytes(),
-        );
         match &gpu_mesh.buffer_info {
             GpuBufferInfo::Indexed {
                 buffer,

examples/2d/mesh2d_manual.rs

@@ -17,9 +17,8 @@ use bevy::{
         render_resource::{
             BlendState, ColorTargetState, ColorWrites, Face, FragmentState, FrontFace,
             MultisampleState, PipelineCache, PolygonMode, PrimitiveState, PrimitiveTopology,
-            PushConstantRange, RenderPipelineDescriptor, ShaderStages, SpecializedRenderPipeline,
+            RenderPipelineDescriptor, SpecializedRenderPipeline, SpecializedRenderPipelines,
-            SpecializedRenderPipelines, TextureFormat, VertexBufferLayout, VertexFormat,
+            TextureFormat, VertexBufferLayout, VertexFormat, VertexState, VertexStepMode,
-            VertexState, VertexStepMode,
         },
         texture::BevyDefault,
         view::{ExtractedView, ViewTarget, VisibleEntities},
@@ -158,18 +157,6 @@ impl SpecializedRenderPipeline for ColoredMesh2dPipeline {
             false => TextureFormat::bevy_default(),
         };
 
-        let mut push_constant_ranges = Vec::with_capacity(1);
-        if cfg!(all(
-            feature = "webgl2",
-            target_arch = "wasm32",
-            not(feature = "webgpu")
-        )) {
-            push_constant_ranges.push(PushConstantRange {
-                stages: ShaderStages::VERTEX,
-                range: 0..4,
-            });
-        }
-
         RenderPipelineDescriptor {
             vertex: VertexState {
                 // Use our custom shader
@@ -197,7 +184,7 @@ impl SpecializedRenderPipeline for ColoredMesh2dPipeline {
                 // Bind group 1 is the mesh uniform
                 self.mesh2d_pipeline.mesh_layout.clone(),
             ],
-            push_constant_ranges,
+            push_constant_ranges: vec![],
             primitive: PrimitiveState {
                 front_face: FrontFace::Ccw,
                 cull_mode: Some(Face::Back),