revert: color palette for calendar (#118)

src/stories/components/CourseCellColorPicker.stories.tsx

@@ -1,20 +0,0 @@
-import type { ThemeColor } from '@shared/util/themeColors';
-import type { Meta, StoryObj } from '@storybook/react';
-import CourseCellColorPicker from '@views/components/common/CourseCellColorPicker/CourseCellColorPicker';
-import React, { useState } from 'react';
-
-const meta = {
-    title: 'Components/Common/CourseCellColorPicker',
-    component: CourseCellColorPicker,
-} satisfies Meta<typeof CourseCellColorPicker>;
-
-export default meta;
-type Story = StoryObj<typeof CourseCellColorPicker>;
-
-export const Default: Story = {
-    render: () => {
-        // TODO
-        const [selectedColor, setSelectedColor] = useState<ThemeColor | null>(null);
-        return <CourseCellColorPicker setSelectedColor={setSelectedColor} />;
-    },
-};