Remove obsolete UFL transformations

python/dune/perftool/ufl/componentindex.py

python/dune/perftool/ufl/extract_accumulation_terms.py

python/dune/perftool/ufl/transformations/axiparallel.py

.../dune/perftool/ufl/transformations/identitypropagation.py

...erftool/ufl/transformations/order_gradient_restriction.py

python/dune/perftool/ufl/transformations/reindexing.py

python/dune/perftool/ufl/transformations/replace.py

python/dune/perftool/ufl/transformations/unroll.py

python/dune/perftool/ufl/transformations/zeropropagation.py