Update pull_request.yml

Author: MaxDesiatov

.github/workflows/pull_request.yml

@@ -15,16 +15,6 @@ jobs:
       swift_flags: --package-path AudioWorkstation/Guest --product Plotter
       swift_nightly_flags: --package-path AudioWorkstation/Guest --product Plotter
 
-  webgpu-demo:
-    name: Build WebGPUDemo
-    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
-    with:
-      enable_wasm_sdk_build: true
-      enable_linux_checks: false
-      enable_windows_checks: false
-      swift_flags: --package-path WebGPUDemo
-      swift_nightly_flags: --package-path WebGPUDemo
-
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main