tools: remove rpm build scripts

I added these in 2013 but I don't think anyone uses them and I'm not
even sure they still produce a working package.

I move to remove them because that makes subsequent cleanup a little
easier.

PR-URL: nodejs/node#43647
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Mohammed Keyvanzadeh <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Juan José Arboleda <[email protected]>

Author: bnoordhuis