Remove trailing blank line in constructor body

Author: qjia7

onnxruntime/core/providers/webgpu/webgpu_execution_provider.cc

@@ -578,7 +578,6 @@ WebGpuExecutionProvider::WebGpuExecutionProvider(int context_id,
       enable_int64_{config.enable_graph_capture || config.enable_int64},
       multi_rotary_cache_concat_offset_{config.multi_rotary_cache_concat_offset},
       prepack_allocator_{std::make_shared<webgpu::GpuBufferAllocator>(context_.InitializerBufferManager(), false)} {
-
   if (config.enable_pix_capture) {
 #if defined(ENABLE_PIX_FOR_WEBGPU_EP)
     // set pix frame generator