Fix missed explicit conversions in examples (#11261)

# Objective

A few of these were missed in #10878

## Solution

Fix em

examples/2d/2d_shapes.rs

@@ -19,7 +19,7 @@ fn setup(
     // Circle
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::Circle::new(50.)).into(),
-        material: materials.add(ColorMaterial::from(Color::PURPLE)),
+        material: materials.add(Color::PURPLE),
         transform: Transform::from_translation(Vec3::new(-150., 0., 0.)),
         ..default()
     });
@@ -38,15 +38,15 @@ fn setup(
     // Quad
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::Quad::new(Vec2::new(50., 100.))).into(),
-        material: materials.add(ColorMaterial::from(Color::LIME_GREEN)),
+        material: materials.add(Color::LIME_GREEN),
         transform: Transform::from_translation(Vec3::new(50., 0., 0.)),
         ..default()
     });
 
     // Hexagon
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::RegularPolygon::new(50., 6)).into(),
-        material: materials.add(ColorMaterial::from(Color::TURQUOISE)),
+        material: materials.add(Color::TURQUOISE),
         transform: Transform::from_translation(Vec3::new(150., 0., 0.)),
         ..default()
     });

examples/2d/bloom_2d.rs

@@ -50,7 +50,7 @@ fn setup(
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::Circle::new(100.)).into(),
         // 4. Put something bright in a dark environment to see the effect
-        material: materials.add(ColorMaterial::from(Color::rgb(7.5, 0.0, 7.5))),
+        material: materials.add(Color::rgb(7.5, 0.0, 7.5)),
         transform: Transform::from_translation(Vec3::new(-200., 0., 0.)),
         ..default()
     });
@@ -59,7 +59,7 @@ fn setup(
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::RegularPolygon::new(100., 6)).into(),
         // 4. Put something bright in a dark environment to see the effect
-        material: materials.add(ColorMaterial::from(Color::rgb(6.25, 9.4, 9.1))),
+        material: materials.add(Color::rgb(6.25, 9.4, 9.1)),
         transform: Transform::from_translation(Vec3::new(200., 0., 0.)),
         ..default()
     });

examples/2d/mesh2d.rs

@@ -20,7 +20,7 @@ fn setup(
     commands.spawn(MaterialMesh2dBundle {
         mesh: meshes.add(shape::Quad::default()).into(),
         transform: Transform::default().with_scale(Vec3::splat(128.)),
-        material: materials.add(ColorMaterial::from(Color::PURPLE)),
+        material: materials.add(Color::PURPLE),
         ..default()
     });
 }

examples/2d/mesh2d_vertex_color_texture.rs

@@ -54,7 +54,7 @@ fn setup(
         mesh: mesh_handle,
         transform: Transform::from_translation(Vec3::new(96., 0., 0.))
             .with_scale(Vec3::splat(128.)),
-        material: materials.add(ColorMaterial::from(texture_handle)),
+        material: materials.add(texture_handle),
         ..default()
     });
 }

examples/2d/pixel_grid_snap.rs

@@ -83,9 +83,9 @@ fn setup_mesh(
 ) {
     commands.spawn((
         MaterialMesh2dBundle {
-            mesh: meshes.add(Mesh::from(shape::Capsule::default())).into(),
+            mesh: meshes.add(shape::Capsule::default()).into(),
             transform: Transform::from_xyz(40., 0., 2.).with_scale(Vec3::splat(32.)),
-            material: materials.add(ColorMaterial::from(Color::BLACK)),
+            material: materials.add(Color::BLACK),
             ..default()
         },
         Rotate,

examples/3d/transmission.rs

@@ -80,12 +80,12 @@ fn setup(
 
     let plane_mesh = meshes.add(shape::Plane::from_size(2.0));
 
-    let cylinder_mesh = meshes.add(Mesh::from(shape::Cylinder {
+    let cylinder_mesh = meshes.add(shape::Cylinder {
         radius: 0.5,
         height: 2.0,
         resolution: 50,
         segments: 1,
-    }));
+    });
 
     // Cube #1
     commands.spawn((