Remove the NANOPB_INTERNALS functions from public API.

These have been deprecated since nanopb-0.1.6 (some since 0.1.3).
Equivalent functions with better interface are available in the API.

Update issue 91
Status: FixedInGit

tests/encode_unittests/SConscript

@@ -1,5 +1,5 @@
 # Build and run the stand-alone unit tests for the nanopb encoder part.
 
 Import('env')
-p = env.Program(["encode_unittests.c", "#common/unittestproto.pb.c", "#common/pb_encode.o"])
+p = env.Program(["encode_unittests.c", "#common/unittestproto.pb.c"])
 env.RunTest(p)