Update to_sandbox.txt

Deleting Homecomputer fonts after blocked them

Author: vv-monsalve

to_sandbox.txt

@@ -6,8 +6,6 @@ ofl/rubikdoodletriangles # https://github.com/google/fonts/pull/7000
 ofl/rubiklines # https://github.com/google/fonts/pull/7003
 ofl/rubikmaps # https://github.com/google/fonts/pull/7005
 ofl/rubikscribble # https://github.com/google/fonts/pull/7004
-ofl/sixtyfour # https://github.com/google/fonts/pull/6919
-ofl/workbench # https://github.com/google/fonts/pull/6917
 
 # Upgrade
 ofl/alike # https://github.com/google/fonts/pull/6929