Remove unused param documentation

Change-Id: I5e7a6deddfe49cf992a8066771a19ea77bed2618
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/32041
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>

src/inspector/inspector_test.cc

@@ -457,7 +457,6 @@ class InspectorHelper {
 
   /// Generates a DepthTextureType appropriate for the params
   /// @param dim the dimensions of the texture
-  /// @param type the data type of the sampled texture
   /// @returns the generated DepthTextureType
   std::unique_ptr<ast::type::DepthTextureType> MakeDepthTextureType(
       ast::type::TextureDimension dim) {