clean thrift->proto enum mapper (#718)

Author: mkolodezny

src/main/java/com/uber/cadence/internal/compatibility/thrift/EnumMapper.java

@@ -60,19 +60,6 @@ public static TaskListKind taskListKind(com.uber.cadence.api.v1.TaskListKind t)
     throw new IllegalArgumentException("unexpected enum value");
   }
 
-  public static TaskListType taskListType(com.uber.cadence.api.v1.TaskListType t) {
-    if (t == TASK_LIST_TYPE_INVALID) {
-      return null;
-    }
-    switch (t) {
-      case TASK_LIST_TYPE_DECISION:
-        return TaskListType.Decision;
-      case TASK_LIST_TYPE_ACTIVITY:
-        return TaskListType.Activity;
-    }
-    throw new IllegalArgumentException("unexpected enum value");
-  }
-
   public static HistoryEventFilterType eventFilterType(com.uber.cadence.api.v1.EventFilterType t) {
     if (t == EventFilterType.EVENT_FILTER_TYPE_INVALID) {
       return null;
@@ -261,20 +248,6 @@ public static WorkflowExecutionCloseStatus workflowExecutionCloseStatus(
     throw new IllegalArgumentException("unexpected enum value");
   }
 
-  public static QueryTaskCompletedType queryTaskCompletedType(
-      com.uber.cadence.api.v1.QueryResultType t) {
-    if (t == QUERY_RESULT_TYPE_INVALID) {
-      return null;
-    }
-    switch (t) {
-      case QUERY_RESULT_TYPE_ANSWERED:
-        return QueryTaskCompletedType.COMPLETED;
-      case QUERY_RESULT_TYPE_FAILED:
-        return QueryTaskCompletedType.FAILED;
-    }
-    throw new IllegalArgumentException("unexpected enum value");
-  }
-
   public static DomainStatus domainStatus(com.uber.cadence.api.v1.DomainStatus t) {
     switch (t) {
       case DOMAIN_STATUS_INVALID: