Revert "qa/cephfs: fix ior build failure"

PR #52416 is incomplete and got merged on the basis of a linked
test run which passed, however, subsequent update to the PR
caused the test to start failing again.

Signed-off-by: Venky Shankar <vshankar@redhat.com>

qa/suites/fs/multiclient/tasks/ior-shared-file.yaml

@@ -5,13 +5,10 @@ tasks:
       - cd $TESTDIR
       - wget http://download.ceph.com/qa/ior.tbz2
       - tar xvfj ior.tbz2
-      - sudo apt purge -y mpich
-      - sudo apt install -y mpich
       - cd ior
       - ./configure
       - make
       - make install DESTDIR=$TESTDIR/binary/
-      - tree binary/
       - cd $TESTDIR/
       - rm ior.tbz2
       - rm -r ior