Drop Luke's certificate.

Wrong data has been uplodaded to shacache.

software/html5as/software.cfg

@@ -134,21 +134,3 @@ zc.recipe.egg = 1.3.2
 # Required by:
 # slapos.core==0.28.2
 zope.interface = 4.0.1
-
-[networkcache]
-# signature certificates of the following uploaders.
-# Łukasz Nowak
-signature-certificate-list =
-  -----BEGIN CERTIFICATE-----
-  MIIB9jCCAV+gAwIBAgIJAMNZBmoIOXPBMA0GCSqGSIb3DQEBBQUAMBMxETAPBgNV
-  BAMMCENPTVAtMTMyMCAXDTEyMDUwMjEyMDQyNloYDzIxMTIwNDA4MTIwNDI2WjAT
-  MREwDwYDVQQDDAhDT01QLTEzMjCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA
-  6peZQt1sAmMAmSG9BVxxcXm8x15kE9iAplmANYNQ7z2YO57c10jDtlYlwVfi/rct
-  xNUOKQtc8UQtV/fJWP0QT0GITdRz5X/TkWiojiFgkopza9/b1hXs5rltYByUGLhg
-  7JZ9dZGBihzPfn6U8ESAKiJzQP8Hyz/o81FPfuHCftsCAwEAAaNQME4wHQYDVR0O
-  BBYEFNuxsc77Z6/JSKPoyloHNm9zF9yqMB8GA1UdIwQYMBaAFNuxsc77Z6/JSKPo
-  yloHNm9zF9yqMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADgYEAl4hBaJy1
-  cgiNV2+Z5oNTrHgmzWvSY4duECOTBxeuIOnhql3vLlaQmo0p8Z4c13kTZq2s3nhd
-  Loe5mIHsjRVKvzB6SvIaFUYq/EzmHnqNdpIGkT/Mj7r/iUs61btTcGUCLsUiUeci
-  Vd0Ozh79JSRpkrdI8R/NRQ2XPHAo+29TT70=
-  -----END CERTIFICATE-----