Revert "tools: getb64key - print the base64 version of a PEM public key file"

Reason for revert: This has been unused since lineage-16.0

This reverts commit 0a656b6446.

Change-Id: Ib804efa52b1af444be1de68066be48c30ea4d22b

build/tools/getb64key.py

@@ -1,18 +0,0 @@
-#!/usr/bin/env python
-
-from __future__ import print_function
-
-import base64
-import sys
-
-pkFile = open(sys.argv[1], 'rb').readlines()
-base64Key = ""
-inCert = False
-for line in pkFile:
-    if line.startswith(b"-"):
-        inCert = not inCert
-        continue
-
-    base64Key += line.strip()
-
-print(base64.b16encode(base64.b64decode(base64Key)).lower())