[hotfix] Remove weekly test against 1.19-SNAPSHOT since that's currently broken and tracked under FLINK-34193

Author: MartijnVisser

.github/workflows/weekly.yml

@@ -33,10 +33,6 @@ jobs:
           flink: 1.18-SNAPSHOT,
           jdk: '8, 11, 17',
           branch: main
-        }, {
-          flink: 1.19-SNAPSHOT,
-          jdk: '8, 11, 17, 21',
-          branch: main
         }, {
           flink: 1.17.2,
           branch: v3.1