Revert "add doxyfile"
Revert "add doxyfile"

This reverts commit aab7da4ebcb5a7d23c03d1bd467335d3e5db1217 [formerly c4d027d001710ceebd07cbfe8a3c9abf90d67fee].


Former-commit-id: 69faf1bfec2f5b84bc2e67219ec61d9fa159b80a
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin