remove unsupported dev-libs/libcouchbase

this was for work, and honestly I don't know if I ever used it

dev-libs/libcouchbase/Manifest

@@ -1,2 +0,0 @@
-DIST CouchbaseMock-1.4.3.jar 2634861 BLAKE2B 5ceb90e1fc73615e5c833b6b36115cfbc75a45bb57b25bdc19301c994ce6cf748a03588fd87887e7d5631101123a0424426b04a4fc72bb59119ae847b181c446 SHA512 5d9e5b0b66e648e5d2b4150cf9663213e77a1f548540dd9a1cf2d22eeaa6d4f0b8c0417252a7745c44d26d33e7e233e885ee9af4e44fcdb6fde00f70bcebd751
-DIST libcouchbase-2.10.6.tar.gz 1342934 BLAKE2B d86844367347e4496a73c1b2c42cc2f75006bd2e78bf4bb07e8173a0df90780ec7035fd0281b2be8d8ff3fef89dcff4f042cc687e80727eb55a8bf7dd6b46781 SHA512 3aa2e18b74a7e567f0c5653d5ed23f11658127f1a675543c2ca30aefd37fbc9e69b83f497032e104ada27d7ba56a49db39d3b4cf26f53a56b786d66329aa5fff

dev-libs/libcouchbase/libcouchbase-2.10.6.ebuild

@@ -1,35 +0,0 @@
-# Copyright 1999-2016 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-EAPI=5
-
-DESCRIPTION="Couchbase C Client Library"
-HOMEPAGE="http://www.couchbase.com/communities/c-client-library"
-SRC_URI="http://packages.couchbase.com/clients/c/${P}.tar.gz
-test? ( http://packages.couchbase.com/clients/c/mock/CouchbaseMock-1.4.3.jar )"
-
-LICENSE="Apache-2.0"
-SLOT="0"
-KEYWORDS="amd64 ~x86"
-IUSE="doc static-libs tools test"
-
-# FIXME: tests take forever to run ?
-#RESTRICT="test"
-
-RDEPEND="dev-libs/libevent
-dev-libs/openssl:*"
-DEPEND="${RDEPEND}
-dev-util/cmake"
-
-src_configure() {
-	use test && cp "${DISTDIR}/CouchbaseMock-1.4.3.jar" "${WORKDIR}/${P}/tests/CouchbaseMock.jar"
-	./cmake/configure --prefix "${EPREFIX}" $(use_enable tools) $(use_enable test couchbasemock)
-}
-
-src_install() {
-	default
-	use doc || rm -rf "${D}"/usr/share/doc
-	use static-libs || find "${D}" -type f -name "*.la" -delete
-	use tools || rm -rf "${D}"/usr/share/man
-}