Revert "Merge pull request #3499 from ReinUsesLisp/depth-2d-array"

This reverts commit 41905ee467b24172ba93e3fcd665bb4e4806a45a, reversing
changes made to 35145bd529c3517e2c366efc764a762092d96edf.

It causes regressions in several games.

src/video_core/texture_cache/surface_params.cpp

@@ -113,10 +113,8 @@ SurfaceParams SurfaceParams::CreateForTexture(const FormatLookupTable& lookup_ta
         params.height = tic.Height();
         params.depth = tic.Depth();
         params.pitch = params.is_tiled ? 0 : tic.Pitch();
-        if (params.target == SurfaceTarget::Texture2D && params.depth > 1) {
-            params.depth = 1;
-        } else if (params.target == SurfaceTarget::TextureCubemap ||
-                   params.target == SurfaceTarget::TextureCubeArray) {
+        if (params.target == SurfaceTarget::TextureCubemap ||
+            params.target == SurfaceTarget::TextureCubeArray) {
             params.depth *= 6;
         }
         params.num_levels = tic.max_mip_level + 1;