Remove explicit storage class from samplers/textures

Tint automatically infers a storage class of `handle` for these types
of variable, as per the WGSL spec. Explicitly specifying a storage
class for them will soon become an error.

Bug: tint:332
Change-Id: Ib67e44a5afcdd364470488fd4b456a2b42304daa
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/41402
Commit-Queue: Austin Eng <enga@chromium.org>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
diff --git a/examples/CppHelloTriangle.cpp b/examples/CppHelloTriangle.cpp
index bc1df72..510f181 100644
--- a/examples/CppHelloTriangle.cpp
+++ b/examples/CppHelloTriangle.cpp
@@ -104,8 +104,8 @@
 
     wgpu::ShaderModule fsModule = utils::CreateShaderModuleFromWGSL(device, R"(
         [[builtin(frag_coord)]] var<in> FragCoord : vec4<f32>;
-        [[group(0), binding(0)]] var<uniform_constant> mySampler: sampler;
-        [[group(0), binding(1)]] var<uniform_constant> myTexture : texture_2d<f32>;
+        [[group(0), binding(0)]] var mySampler: sampler;
+        [[group(0), binding(1)]] var myTexture : texture_2d<f32>;
 
         [[location(0)]] var<out> FragColor : vec4<f32>;
         [[stage(fragment)]] fn main() -> void {