removed psblas example for now

.gitmodules

@@ -2,6 +2,3 @@
 	path = deps/petsc
 	url = https://gitlab.com/petsc/petsc.git
 	branch = release
-[submodule "deps/psblas"]
-	path = deps/psblas
-	url = https://github.com/sfilippone/psblas3.git

psblas-example.f90

@@ -1,22 +0,0 @@
-program hello
-  implicit none
-  type(psb_ctxt_type) :: icontxt
-  integer(psb_ipk_) ::  iam, np, ip, jp, idummy
-
-  call psb_init(icontxt)
-  call psb_info(icontxt,iam,np)            
-  !   have all processes check in 
-  if ((iam >= 0).and.(iam < np)) then 
-    if (iam == 0)  then 
-      do ip = 1, np-1
-        call psb_rcv(icontxt,idummy,ip)          
-      enddo
-      write(*,*) 'Hello, world: all ',np, &
-           & ' processes checked in!'
-    else
-      ip = 0
-      call psb_snd(icontxt,idummy,ip)
-    endif
-  end if
-  call psb_exit(icontxt)
-end program hello