Remove C* 1.2 from CI tests

Author: kishkaru

build.yaml

@@ -4,30 +4,21 @@ schedules:
     matrix:
       exclude:
         - ruby: ['2.2', 'jruby9k']
-        - cassandra: ['1.2', '2.0', '2.2', '3.0']
+        - cassandra: ['2.0', '2.2', '3.0']
   nightly:
     schedule: nightly
     branches:
       include: [master]
     matrix:
       exclude:
         - ruby: jruby9k
-        - cassandra: 1.2
-  weekly:
-    schedule: weekly
-    branches:
-      include: [master]
-    matrix:
-      exclude:
-        - ruby: jruby9k
 
 ruby:
   - 2.2
   - 2.3
   - jruby1.7
   - jruby9k
 cassandra:
-  - 1.2
   - 2.0
   - 2.1
   - 2.2