update setuptools; remove header

So users don't need to manually exclude the header from the git commit

pip/requirements.txt

@@ -1,5 +1,3 @@
-# See README.md
-
 appdirs==1.4.4            # via black
 astroid==2.4.2            # via pylint
 atomicwrites==1.4.0 ; sys_platform == "win32"  # via -r requirements.in, pytest
@@ -62,4 +60,4 @@ wrapt==1.12.1             # via astroid
 
 # The following packages are considered to be unsafe in a requirements file:
 pip==20.3.3               # via pip-tools
-setuptools==51.0.0        # via jsonschema
+setuptools==51.1.0.post20201221  # via jsonschema

pip/update.py

@@ -3,15 +3,16 @@ import os
 import click
 from piptools.scripts import compile
 
+
 @click.group()
 def cli():
     pass
 
+
 cli.add_command(compile.cli, "compile")
 
 print("Updating deps...")
 os.chdir("pip")
-sys.argv[1:] = ["compile", "--allow-unsafe", "--upgrade"]
-
-cli()
+sys.argv[1:] = ["compile", "--allow-unsafe", "--upgrade", "--no-header"]
 
+cli()