Drop no-longer-relevant copyright holder name

Author: hebasto

contrib/devtools/copyright_header.py

@@ -97,7 +97,6 @@ def compile_copyright_regex(copyright_style, year_style, name):
     "Wladimir J. van der Laan\n",
     "Jeff Garzik\n",
     "Jan-Klaas Kollhof\n",
-    "Sam Rushing\n",
     "ArtForz -- public domain half-a-node\n",
     "Intel Corporation",
     "The Zcash developers",