Remove dead components from MAINTAINERS.

ChangeLog:

	* MAINTAINERS: Remove entries for removed
	components (HSA, BRIG, libhsail-rt).
	Move Pekka to Write After Approval.

MAINTAINERS

@@ -150,8 +150,6 @@ C front end/ISO C99	Joseph Myers		<joseph@codesourcery.com>
 Ada front end		Arnaud Charlet		<charlet@adacore.com>
 Ada front end		Eric Botcazou		<ebotcazou@libertysurf.fr>
 Ada front end		Pierre-Marie de Rodat	<derodat@adacore.com>
-BRIG (HSAIL) front end	Pekka Jääskeläinen	<pekka.jaaskelainen@parmance.com>
-BRIG (HSAIL) front end 	Martin Jambor		<mjambor@suse.cz>
 c++			Jason Merrill		<jason@redhat.com>
 c++			Nathan Sidwell		<nathan@acm.org>
 D front end		Iain Buclaw		<ibuclaw@gdcproject.org>
@@ -177,8 +175,6 @@ libobjc			Andrew Pinski		<pinskia@gmail.com>
 libquadmath		Tobias Burnus		<tobias@codesourcery.com>
 libquadmath		Jakub Jelinek		<jakub@redhat.com>
 libvtv			Caroline Tice		<cmtice@google.com>
-libhsail-rt		Pekka Jääskeläinen	<pekka.jaaskelainen@parmance.com>
-libhsail-rt		Martin Jambor		<mjambor@suse.cz>
 libphobos		Iain Buclaw		<ibuclaw@gdcproject.org>
 line map		Dodji Seketeli		<dodji@redhat.com>
 soft-fp			Joseph Myers		<joseph@codesourcery.com>
@@ -204,7 +200,6 @@ fixincludes		Bruce Korb		<bkorb@gnu.org>
 *gimpl*			Jason Merrill		<jason@redhat.com>
 gcse.c			Jeff Law		<jeffreyalaw@gmail.com>
 global opt framework	Jeff Law		<jeffreyalaw@gmail.com>
-hsa			Martin Jambor		<mjambor@suse.cz>
 jump.c			David S. Miller		<davem@redhat.com>
 web pages		Gerald Pfeifer		<gerald@pfeifer.com>
 config.sub/config.guess	Ben Elliston		<config-patches@gnu.org>
@@ -449,6 +444,7 @@ Mihail Ionescu					<mihail.ionescu@arm.com>
 Vladislav Ivanishin				<vlad@ispras.ru>
 Alexander Ivchenko				<aivchenk@gmail.com>
 Balaji V. Iyer					<bviyer@gmail.com>
+Pekka Jääskeläinen				<pekka.jaaskelainen@parmance.com>
 Daniel Jacobowitz				<drow@false.org>
 Andreas Jaeger					<aj@suse.de>
 Harsha Jagasia					<harsha.jagasia@amd.com>