fix: Remove duplicate imports of js files in instructor dashboard pages

[rehmansheikh222]

I was working on enabling the dark theme in the Instructor Dashboard using Tutor Indigo, which adds the dark theme file to the application JavaScript pipeline. However, the dark theme toggle wasn’t working, no matter how many times I clicked it. After digging into the issue, I found that the event listener for the theme toggle was being added twice, causing it to do nothing.

The reason for this double event listener was that the Instructor Dashboard was importing the application JavaScript pipeline twice. Here’s how it happened: The Instructor Dashboard inherits from main.html, which includes the application pipeline. On top of that, the Instructor Dashboard itself explicitly imports the application pipeline again. This led to every JavaScript file in the application pipeline, including the dark theme file, being loaded twice.

To fix this, I removed the redundant import of the application pipeline from the Instructor Dashboard. Now, the application pipeline is loaded only once, ensuring that event listeners are registered correctly. This change fixed the dark theme toggle issue and prevents similar problems from happening in the future.

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