Fix double deletion of DescriptorSetLayouts

When VkPipeline creation fails the PipelineStateBuilder cleans up
afterwards. It was deleting the sampler DescriptorSetLayout when that
is owned by the ResourceProvider.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4964

Change-Id: I876c570349f96f58e0256dc91bc1135c59a2058d
Reviewed-on: https://skia-review.googlesource.com/4964
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed