gradient_similarity() got an unexpected keyword argument 'experimental'

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## Expected Behavior

Parameter `experimental` should not be used for 2d gradient_similarity().

## Current Behavior

Parameter `experimental` gets passed to gradient_similarity().

## Possible Solution

## Steps to Reproduce (for bugs)

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## Context

## Your Environment

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* Browser Name and version:
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* Link to your project:

Look for the gradient_similarity() function in the codebase, likely in a file related to image quality assessment. Identify where the function is called with the 'experimental' parameter and remove or adjust that argument. Check if there are any tests for gradient_similarity() to ensure the fix doesn't break existing functionality.

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