Remove duplicated tests.

Remove duplicated tests.

These tests are complete duplicates (exact same source and output file)
of other tests. I found them by running

    $ md5sum tests/*/*cc | awk '{print $1}' | sort | uniq -d
    0be8a61d11d01d793df126ad14932c6e
    5c1929a43e16b989065ae8d325c29136
    6587df713735d2c99f43cc2212550ed4
    97de58c85ba5c0b00905a8d402712381
    9ca74160ee9756c6e64b475c9539c239
    c42ec6af54ccc4af92035a3a9a078830
    c8c0be1052e2f6f64bbaa36b7ebe8d95
    e200c88ddc7bbb442d760a1be01a6a1d
    ea545bb72f77c0f4ac7133479340f92e

and then, for each particular MD5sum, running something like

    $ md5sum */*cc | grep 0be8a61

to locate the tests. For the sake of record, here are the (formerly)
duplicated tests:

0be8a61d11d01d793df126ad14932c6e
grid/grid_in_gmsh_02: same as grid/grid_in_gmsh_01

5c1929a43e16b989065ae8d325c29136
bits/chunk_sparse_matrix_03b: same as bits/chunk_sparse_matrix_03a

6587df713735d2c99f43cc2212550ed4
grid/have_same_coarse_mesh_04: same as grid/have_same_coarse_mesh_02

97de58c85ba5c0b00905a8d402712381
bits/sparse_matrix_03b : same as bits/sparse_matrix_03a

9ca74160ee9756c6e64b475c9539c239
dofs/accessor_02: same as dofs/accessor_01

c42ec6af54ccc4af92035a3a9a078830
grid/get_finest_common_cells_04 : same as grid/get_finest_common_cells_02

c8c0be1052e2f6f64bbaa36b7ebe8d95
grid/grid_out_05: same as grid/grid_out_03

e200c88ddc7bbb442d760a1be01a6a1d
bits/fe_field_function_vector_03: same as bits/fe_field_function_03

ea545bb72f77c0f4ac7133479340f92e
manifold/tria_accessor_point_03: same as manifold/tria_accessor_point_02