generate_notice.py: don't check for strings we don't use any more.

Test: `repo upload .`
Change-Id: Idba382c22fb562ca9ba5b9bbdfd3800279b04c25
diff --git a/libc/tools/generate_notice.py b/libc/tools/generate_notice.py
index 505708a..69d2d00 100755
--- a/libc/tools/generate_notice.py
+++ b/libc/tools/generate_notice.py
@@ -45,14 +45,6 @@
     return True
 
 
-def is_auto_generated(content):
-    if "Generated by gensyscalls.py" in content or "generated by genserv.py" in content:
-        return True
-    if "This header was automatically generated from a Linux kernel header" in content:
-        return True
-    return False
-
-
 def is_copyright_end(line: str, first_line_was_hash: bool) -> bool:
     endings = [
         " $FreeBSD: ",
@@ -153,10 +145,6 @@
         warn_verbose("ignoring short file %s" % path)
         return
 
-    if is_auto_generated(content):
-        warn_verbose("ignoring auto-generated file %s" % path)
-        return
-
     if not "Copyright" in content:
         if "public domain" in content.lower():
             warn_verbose("ignoring public domain file %s" % path)