app-portage/eix: Remove invalid and useless USE flags

Remove the USE flags violating different QA policies or being useless,
in particular: flags used to control *FLAGS, flags used to alter
configuration file, flags used to switch between building separate
executables and symlinks to one executable.

For the former, unconditionally disable altering user's *FLAGS. For
the latter, force the defaults.

app-portage/eix/eix-0.32.1.ebuild

@@ -14,8 +14,7 @@ SRC_URI="https://github.com/vaeth/eix/releases/download/v${PV}/${P}.tar.xz"
 LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~ppc-aix ~amd64-fbsd ~sparc-fbsd ~x86-fbsd ~x86-freebsd ~ia64-hpux ~x86-interix ~amd64-linux ~ia64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
-IUSE="debug +dep doc nls optimization +required-use security strong-optimization
-	strong-security sqlite swap-remote tools"
+IUSE="debug doc nls sqlite"
 
 BOTHDEPEND="nls? ( virtual/libintl )
 	sqlite? ( >=dev-db/sqlite-3:= )"
@@ -41,22 +40,32 @@ src_prepare() {
 
 src_configure() {
 	local myconf=(
-		$(use_enable debug debugging)
+		$(use_enable debug paranoicasserts)
 		$(use_enable nls)
-		$(use_enable optimization)
-		$(use_enable security)
-		$(use_enable strong-optimization)
-		$(use_enable strong-security)
-		$(use_enable swap-remote)
-		$(use_enable tools separate-tools)
-		$(use_with dep dep-default)
 		$(use_with doc extra-doc)
-		$(use_with prefix always-accept-keywords)
-		$(use_with required-use required-use-default)
 		$(use_with sqlite)
-		--with-zsh-completion
+
+		# default configuration
+		$(use_with prefix always-accept-keywords)
+		--with-dep-default
+		--with-required-use-default
+
+		# paths
 		--with-portage-rootpath="${ROOTPATH}"
 		--with-eprefix-default="${EPREFIX}"
+
+		# build a single executable with symlinks
+		--disable-separate-binaries
+		--disable-separate-tools
+
+		# used purely to control/disrespect *FLAGS
+		--disable-debugging
+		--disable-new_dialect
+		--disable-optimization
+		--disable-strong-optimization
+		--disable-security
+		--disable-nopie-security
+		--disable-strong-security
 	)
 
 	econf "${myconf[@]}"