Removed Dark mode

[rrtk857]

Overview

1. This PR fixes or fixes part of [BUG]: Remove dark Mode from the Codebase. #99 .
2. This PR does the following: Removed dark mode from codebase.

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• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
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Proof that changes are correct

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[prernadabi23]

Great! @rrtk857