Remove leftover strlcpy.h copyright
Remove leftover strlcpy.h copyright

src/strlcpy.h was removed by https://github.com/bitcoin/bitcoin/commit/6032e4f4e7c1892a4e3f0a1a2007e4cd0fe99937

wastholm/bitcoin,wastholm/bitcoin,wastholm/bitcoin,wastholm/bitcoin,wastholm/bitcoin,wastholm/bitcoin