[reggen] Remove excess licensing text

Reduce confusion by removing the comments stating the source file's
license.

Signed-off-by: Chris Frantz <cfrantz@google.com>
diff --git a/util/reggen/gen_tock.py b/util/reggen/gen_tock.py
index d0e6f36..b62dde9 100644
--- a/util/reggen/gen_tock.py
+++ b/util/reggen/gen_tock.py
@@ -377,18 +377,6 @@
 
     if src_file:
         genout(outfile, '// Original reference file: {}\n', src_file)
-    if src_copy:
-        genout(
-            outfile,
-            '// Copyright information found in the reference file:\n')
-        genout(outfile, '//   {}\n', src_copy)
-    if src_lic is not None:
-        genout(
-            outfile,
-            '// Licensing information found in the reference file:\n')
-        for line in src_lic.splitlines():
-            genout(outfile, '//   {}\n', line)
-        genout(outfile, '\n')
 
     for access in sorted(access_type):
         genout(outfile, "use kernel::utilities::registers::{};\n", access)