Remove unused themes

src/client/themes/cosmo.json5

-{
-	id: '',
-
-	name: 'Cosmo',
-	author: 'syuilo',
-	desc: '',
-
-	base: 'dark',
-
-	props: {
-		accent: '#d04343',
-		panel: '#1d2130',
-		bg: '#0e0f17',
-		fg: '#b1c2e3',
-		renote: '@accent',
-		link: '#57b5ab',
-		mention: '#7b61d4',
-		mentionMe: '#c061d4',
-		hashtag: '#d4d461',
-		divider: 'rgb(225 211 255 / 20%)',
-	},
-}

src/client/themes/d-lime.json5

-{
-	id: '326dc4bf-29d9-45b4-889e-bdc33e84919b',
-
-	name: 'Mi D Lime',
-	author: 'syuilo',
-
-	base: 'dark',
-
-	props: {
-		accent: 'rgb(152, 196, 69)',
-		bg: 'rgb(54, 54, 54)',
-		fg: 'rgb(199, 209, 216)',
-		fgHighlighted: '#fff',
-		divider: 'rgba(255, 255, 255, 0.14)',
-		panel: '@bg',
-		panelShadow: '" 0 0 0 1px var(--divider)',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
-		infoFg: '@accent',
-		infoBg: 'rgb(0, 0, 0)',
-		header: ':alpha<0.7<@bg',
-		navBg: 'rgb(71, 71, 71)',
-		renote: '@accent',
-		mention: '#da6d35',
-		mentionMe: '#d44c4c',
-		hashtag: '#4cb8d4',
-		link: '@accent',
-	},
-}

src/client/themes/d-orange.json5

-{
-	id: '60960086-26da-4f3c-bb0c-f6a4f89e0f60',
-
-	name: 'Mi D Orange',
-	author: 'syuilo',
-
-	base: 'dark',
-
-	props: {
-		accent: 'rgb(196 115 69)',
-		bg: 'rgb(54, 54, 54)',
-		fg: 'rgb(199, 209, 216)',
-		fgHighlighted: '#fff',
-		divider: 'rgba(255, 255, 255, 0.14)',
-		panel: '@bg',
-		panelShadow: '" 0 0 0 1px var(--divider)',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
-		infoFg: '@accent',
-		infoBg: 'rgb(0, 0, 0)',
-		header: ':alpha<0.7<@bg',
-		navBg: 'rgb(71, 71, 71)',
-		renote: '@accent',
-		mention: '#da6d35',
-		mentionMe: '#d44c4c',
-		hashtag: '#4cb8d4',
-		link: '@accent',
-	},
-}

src/client/themes/l-peach.json5

-{
-	id: 'e9c8c01d-9c15-48d0-9b5c-3d00843b5b36',
-
-	name: 'Mi L Peach',
-	author: 'syuilo',
-
-	base: 'light',
-
-	props: {
-		accent: 'rgb(206, 147, 191)',
-		bg: '#fff8f8',
-		fg: 'rgb(161, 139, 146)',
-		divider: '#ece7e7',
-		renote: '@accent',
-		link: '@accent',
-		mention: '@accent',
-		hashtag: '@accent',
-		panelHeaderDivider: '@divider',
-	},
-}

src/client/themes/lime-gray.json5

-{
-	id: '326dc4bf-29d9-45b4-889e-bdc33e84919b',
-
-	name: 'Lime Gray',
-	author: 'syuilo',
-
-	base: 'dark',
-
-	props: {
-		accent: 'rgb(152, 196, 69)',
-		bg: 'rgb(54, 54, 54)',
-		fg: 'rgb(199, 209, 216)',
-		fgHighlighted: '#fff',
-		divider: 'rgba(255, 255, 255, 0.14)',
-		panel: 'rgb(54, 54, 54)',
-		panelShadow: '" 0 0 0 1px var(--divider)',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
-		infoFg: '@accent',
-		infoBg: 'rgb(0, 0, 0)',
-		header: ':alpha<0.7<@bg',
-		navBg: 'rgb(71, 71, 71)',
-		mention: '@accent',
-		hashtag: '@accent',
-		link: '@accent',
-		renote: 'rgb(118, 179, 40)',
-	},
-}