sci-libs/dealii: do not depend on virtual/mpi[cxx]

Manually verified that we do not require the deprecated cxx interface by
compiling against sys-cluster/openmpi-5.0.6

dealii never used the mpi c++ interface, the dependency was probably
added because dealii is a c++ library...

Signed-off-by: Matthias Maier <tamiko@gentoo.org>

sci-libs/dealii/dealii-9.6.2-r2.ebuild

@@ -62,7 +62,7 @@ RDEPEND="dev-libs/boost:=
 		>=sci-libs/metis-5
 		mpi? ( >=sci-libs/parmetis-4 )
 	)
-	mpi? ( virtual/mpi[cxx] )
+	mpi? ( virtual/mpi )
 	muparser? ( dev-cpp/muParser )
 	opencascade? ( sci-libs/opencascade:= )
 	p4est? ( sci-libs/p4est[mpi] )

sci-libs/dealii/dealii-9.7.0.ebuild

@@ -59,7 +59,7 @@ RDEPEND="dev-libs/boost:=
 		>=sci-libs/metis-5
 		mpi? ( >=sci-libs/parmetis-4 )
 	)
-	mpi? ( virtual/mpi[cxx] )
+	mpi? ( virtual/mpi )
 	mumps? ( sci-libs/mumps[mpi] )
 	muparser? ( dev-cpp/muParser )
 	opencascade? ( sci-libs/opencascade:= )

sci-libs/dealii/dealii-9999.ebuild

@@ -59,7 +59,7 @@ RDEPEND="dev-libs/boost:=
 		>=sci-libs/metis-5
 		mpi? ( >=sci-libs/parmetis-4 )
 	)
-	mpi? ( virtual/mpi[cxx] )
+	mpi? ( virtual/mpi )
 	mumps? ( sci-libs/mumps[mpi] )
 	muparser? ( dev-cpp/muParser )
 	opencascade? ( sci-libs/opencascade:= )