Bug 1705763: Remove build/genrc.sh file r=sheehan

This file has been unchanged (other than license changes)
since the 1998 "free the lizard" commit.

It's not referenced from any other file.
It's time to retire, `genrc.sh`.

Differential Revision: https://phabricator.services.mozilla.com/D112374

build/genrc.sh

@@ -1,13 +0,0 @@
-#!/bin/sh
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DATATYPE="$1"
-INFILE="$2"
-
-echo "${DATATYPE} RCDATA"
-sed 's/"/""/g' ${INFILE} | awk 'BEGIN { printf("BEGIN\n") } { printf("\"%s\\r\\n\",\n", $0) } END { printf("\"\\0\"\nEND\n") }'
-
-exit 0