Move SHELTER from ecosystem to mu

See Raku/modules.raku.org#49 (comment)

Author: zoffixznet

META.list

@@ -104,10 +104,8 @@ https://raw.githubusercontent.com/tadzik/Bailador/master/META.info
 https://raw.githubusercontent.com/perl6/form/master/META.info
 https://raw.githubusercontent.com/tadzik/Text-T9/master/META.info
 https://raw.githubusercontent.com/jnthn/grammar-debugger/master/META.info
-https://raw.githubusercontent.com/perl6/ecosystem/master/SHELTER/lolsql/META.info
 https://raw.githubusercontent.com/uasi/messagepack-pm6/master/META.info
 https://raw.githubusercontent.com/viklund/november/master/META.info
-https://raw.githubusercontent.com/perl6/ecosystem/master/SHELTER/io-prompt/META.info
 https://raw.githubusercontent.com/zag/plosurin/master/META.info
 https://raw.githubusercontent.com/retupmoca/p6-Email-Simple/master/META.info
 https://raw.githubusercontent.com/retupmoca/p6-Email-MIME/master/META.info