chore(io): delete RMED result-file helpers

Remove the lightweight HDF5 wrappers around Code_Aster `.rmed` post-processing.

- Drop `RMEDFile`, `aster_read_nodes`, and related helpers from
  `src/io/read_aster_results.jl`.

src/io/read_aster_results.jl

@@ -1,60 +0,0 @@
-# This file is a part of JuliaFEM.
-# License is MIT: see https://github.com/JuliaFEM/AsterReader.jl/blob/master/LICENSE
-
-""" Code Aster result file (.rmed). """
-mutable struct RMEDFile
-    data :: Dict
-end
-
-function RMEDFile(fn::String)
-    return RMEDFile(h5read(fn, "/"))
-end
-
-""" Return nodes from result med file. """
-function aster_read_nodes(rmed::RMEDFile)
-    increments = keys(rmed.data["ENS_MAA"]["MAIL"])
-    @assert length(increments) == 1
-    increment = first(increments)
-    nodes = rmed.data["ENS_MAA"]["MAIL"][increment]["NOE"]
-    node_names = nodes["NOM"]
-    node_coords = nodes["COO"]
-    nnodes = length(node_names)
-    dim = round(Int, length(node_coords)/nnodes)
-    node_coords = reshape(node_coords, nnodes, dim)'
-    stripper(node_name) = strip(ascii(unsafe_string(pointer(convert(Vector{UInt8}, node_name)))))
-    node_names = map(stripper, node_names)
-    node_ids = map(parse_node_id, node_names)
-    nodes = Dict(j => node_coords[:,j] for j in node_ids)
-    return nodes
-end
-
-""" Read nodal field from rmed file. """
-function aster_read_data(rmed::RMEDFile, field_name; field_type=:NODE,
-                         info_fields=true, node_ids=nothing)
-
-    if occursin("ELGA", field_name)
-        field_type = :GAUSS
-    end
-
-    if node_ids == nothing
-        nodes = aster_read_nodes(rmed)
-        node_ids = sort(collect(keys(nodes)))
-    end
-
-    if info_fields
-        field_names = keys(rmed.data["CHA"])
-        all_fields = join(field_names, ", ")
-        @info("results: $all_fields")
-    end
-
-    chdata = rmed.data["CHA"]["RESU____$field_name"]
-    @assert length(chdata) == 1
-    increment = chdata[first(keys(chdata))]
-    if field_type == :NODE
-        data = increment["NOE"]["MED_NO_PROFILE_INTERNAL"]["CO"]
-        results = Dict(j => data[j] for j in node_ids)
-    else
-        error("Unable to read result of type $field_type: not implemented")
-    end
-    return results
-end