Fix findbugs RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE in DataCenterVO.java Assert isn't used in prod runtime

Signed-off-by: Daan Hoogland <daan.hoogland@gmail.com>

engine/schema/src/com/cloud/dc/DataCenterVO.java

@@ -375,8 +375,6 @@ public class DataCenterVO implements DataCenter {
     }
 
     public String getDetail(String name) {
-        assert (details != null) : "Did you forget to load the details?";
-
         return details != null ? details.get(name) : null;
     }