remove git hash from most generated files
Having
/* This file is generated by venus-protocol git-@VCS_TAG@. */
in every file is too noisy when there are 68 files. Instead, have that in two files (vn_protocol_driver.h
and vn_protocol_renderer.h
) and update the other 66 files to have
/* This file is generated. See vn_protocol_driver.h. */
or
/* This file is generated. See vn_protocol_renderer.h. */
/cc @zzyiwei