Remove the scripts I wrote when I was being dumb

Recall that I had the problem of not being able to load NaCl into the context
of my background script.  I thought the problem was some nonsense with the way
"security" works in browser extensions.  There are some contexts where in order
to load a script, you must explicitly specify the SHA-256 or SHA-384 hash of
the script, in base64 notation.  I wrote these scripts for the purpose of
quickly reading a file and spitting out those values, so that I could easily
update the manifest as I was fooling around with the scripts.

It turned out that entire hypothesis was wrong: https://github.com/aeternity/Vanillae/commit/b680336ba464eafe63daafd95002f09e798c09d9

And therefore these scripts are now just junk

utils/b64sha256/b64sha256.erl

@@ -1,49 +0,0 @@
-#!/usr/bin/env escript
-
-%% This is a script to print out the base64 representation of a sha256 hash of
-%% input bytes. This exists because browser extensions are stupid.  In order to
-%% load a script into a page context it needs the sha256 hash encoded in base64
-%% of the script. This script exists to just print that easily
-
--mode(compile).
-
-%% either read from file or read stdin
-main(["-e", FileName]) ->
-    {ok, Bytes} = file:read_file(FileName),
-    main_bytes(ext, Bytes);
-main([FileName]) ->
-    {ok, Bytes} = file:read_file(FileName),
-    main_bytes(normal, Bytes);
-main(["-e"]) ->
-    main_bytes(ext, read_stdin());
-main([]) ->
-    main_bytes(normal, read_stdin()).
-
-
-%% take sha256 of bytes and print in base64
-%% print in manifest extension format
-main_bytes(ext, Bytes) ->
-    Printing = main_bytes(Bytes),
-    io:format("'sha256-~ts'", [Printing]);
-main_bytes(normal, Bytes) ->
-    Printing = main_bytes(Bytes),
-    io:format("~ts~n", [Printing]).
-
-main_bytes(Bytes) ->
-    Sha256 = crypto:hash(sha256, Bytes),
-    base64:encode(Sha256).
-
-
-read_stdin() ->
-    read_stdin(<<>>).
-
-read_stdin(Acc) ->
-    ThisChar = io:get_chars(standard_io, "", 1),
-    case ThisChar of
-        eof ->
-            unicode:characters_to_binary(Acc);
-        {error, Reason} ->
-            error(Reason);
-        Char ->
-            read_stdin([Acc, Char])
-    end.

utils/b64sha256/b64sha384.erl

@@ -1,49 +0,0 @@
-#!/usr/bin/env escript
-
-%% This is a script to print out the base64 representation of a sha384 hash of
-%% input bytes. This exists because browser extensions are stupid.  In order to
-%% load a script into a page context it needs the sha384 hash encoded in base64
-%% of the script. This script exists to just print that easily
-
--mode(compile).
-
-%% either read from file or read stdin
-main(["-e", FileName]) ->
-    {ok, Bytes} = file:read_file(FileName),
-    main_bytes(ext, Bytes);
-main([FileName]) ->
-    {ok, Bytes} = file:read_file(FileName),
-    main_bytes(normal, Bytes);
-main(["-e"]) ->
-    main_bytes(ext, read_stdin());
-main([]) ->
-    main_bytes(normal, read_stdin()).
-
-
-%% take sha384 of bytes and print in base64
-%% print in manifest extension format
-main_bytes(ext, Bytes) ->
-    Printing = main_bytes(Bytes),
-    io:format("'sha384-~ts'", [Printing]);
-main_bytes(normal, Bytes) ->
-    Printing = main_bytes(Bytes),
-    io:format("~ts~n", [Printing]).
-
-main_bytes(Bytes) ->
-    Sha384 = crypto:hash(sha384, Bytes),
-    base64:encode(Sha384).
-
-
-read_stdin() ->
-    read_stdin(<<>>).
-
-read_stdin(Acc) ->
-    ThisChar = io:get_chars(standard_io, "", 1),
-    case ThisChar of
-        eof ->
-            unicode:characters_to_binary(Acc);
-        {error, Reason} ->
-            error(Reason);
-        Char ->
-            read_stdin([Acc, Char])
-    end.