Revert "media-gfx/swayimg: add USE="man zsh-completion""

This reverts commit 394ceadb7f.

Thanks to Nicolas Parlant for the heads up.
Those use flag controlled installing small amount data with no
dependencies so they were unwanted:
https://devmanual.gentoo.org/general-concepts/use-flags/index.html#when-not-to-use-use-flags

Signed-off-by: Filip Kobierski <fkobi@pm.me>

media-gfx/swayimg/swayimg-3.8-r1.ebuild

@@ -1,72 +0,0 @@
-# Copyright 2023-2025 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=8
-
-inherit meson xdg
-
-DESCRIPTION="A lightweight image viewer for Wayland display servers"
-HOMEPAGE="https://github.com/artemsen/swayimg"
-SRC_URI="https://github.com/artemsen/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
-
-LICENSE="MIT"
-SLOT="0"
-KEYWORDS="~amd64"
-IUSE="avif bash-completion exif exr gif heif jpeg jpegxl man png sixel svg test tiff webp zsh-completion X"
-RESTRICT="!test? ( test )"
-
-RDEPEND="
-	dev-libs/json-c:=
-	dev-libs/wayland
-	media-libs/fontconfig
-	media-libs/freetype
-	x11-libs/libxkbcommon
-	avif? ( media-libs/libavif:= )
-	bash-completion? ( app-shells/bash-completion )
-	exif? ( media-libs/libexif )
-	exr? ( media-libs/openexr:= )
-	gif? ( media-libs/giflib:= )
-	heif? ( media-libs/libheif:= )
-	jpeg? ( media-libs/libjpeg-turbo:= )
-	jpegxl? ( media-libs/libjxl:= )
-	png? ( media-libs/libpng:= )
-	sixel? ( media-libs/libsixel )
-	svg? (
-		dev-libs/glib:2
-		gnome-base/librsvg:2
-		x11-libs/cairo[X=]
-	)
-	tiff? ( media-libs/tiff:= )
-	webp? ( media-libs/libwebp:= )"
-DEPEND="${RDEPEND}
-	dev-libs/wayland-protocols
-	svg? ( X? ( x11-base/xorg-proto ) )
-"
-BDEPEND="
-	dev-util/wayland-scanner
-	test? ( dev-cpp/gtest )
-"
-
-src_configure() {
-	local emesonargs=(
-		$(meson_feature avif)
-		$(meson_feature exif)
-		$(meson_feature exr)
-		$(meson_feature gif)
-		$(meson_feature heif)
-		$(meson_feature jpeg)
-		$(meson_feature jpegxl jxl)
-		$(meson_feature png)
-		$(meson_feature sixel)
-		$(meson_feature svg)
-		$(meson_feature test tests)
-		$(meson_feature tiff)
-		$(meson_feature webp)
-		$(meson_feature bash-completion bash)
-		$(meson_feature zsh-completion zsh)
-		$(meson_use man)
-		-Dversion=${PV}
-		-Ddesktop=true
-	)
-	meson_src_configure
-}