chores(build): do not collect sponge.xml from windows builds (#221)

Author: jkwlui

handwritten/datastore/.kokoro/presubmit/windows/common.cfg

@@ -1,9 +1,2 @@
 # Format: //devtools/kokoro/config/proto/build.proto
 
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-