2.99 API: enhance: eliminate type "uchar" in pdbgen
The type is not supported in GimpProcedureConfig, so any PDB procedure declared having an arg of PDB type "uchar" fails.
We are eliminating the uses of the type in a very few PDB procedures in the repo. Then the support for the type in pdbgen (the code generator tool) is cruft which can be deleted, as cleanup. Prevents it from being used in the future.
Alternatively, keep the PBD type and change libgimpconfig to support 8-bit arguments to PDB procedures.
The change is to delete one paragraph in pdb/pdb.pl
More discussion at #10833 (closed) !1335 (merged)