ruby.yml in table_saw-2.10.0

- old
+ new

@@ -8,10 +8,9 @@
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
         ruby:
-          - '2.6.6'
           - '2.7.2'
           - '3.0.0'
         activerecord:
           - '6.0.0'
           - '6.1.0'