Remove redundant null checks for dataverse in storage driver endpoints

Author: jp-tosca

src/main/java/edu/harvard/iq/dataverse/api/Dataverses.java

@@ -2055,10 +2055,6 @@ public Response getStorageDriver(@Context ContainerRequestContext crc, @PathPara
                                      @QueryParam("getEffective") Boolean getEffective) throws WrappedResponse {
 
         Dataverse dataverse = findDataverseOrDie(id);
-
-        if (dataverse == null) {
-            return error(Response.Status.NOT_FOUND, "Could not find dataverse based on the identifier supplied: " + id + ".");
-        }
 
         return response(req -> {
             String storageDriver = execCommand(new GetDataverseStorageDriverCommand(req, dataverse, getEffective));
@@ -2072,9 +2068,7 @@ public Response getStorageDriver(@Context ContainerRequestContext crc, @PathPara
     public Response setStorageDriver(@Context ContainerRequestContext crc, 
                                      @PathParam("identifier") String id, String label) throws WrappedResponse {
         Dataverse dataverse = findDataverseOrDie(id);
-        if (dataverse == null) {
-            return error(Response.Status.NOT_FOUND, "Could not find dataverse based on alias supplied: " + id + ".");
-        }
+
         try {
             AuthenticatedUser user = getRequestAuthenticatedUserOrDie(crc);
             if (!user.isSuperuser()) {
@@ -2099,10 +2093,6 @@ public Response setStorageDriver(@Context ContainerRequestContext crc,
     public Response resetStorageDriver(@Context ContainerRequestContext crc, @PathParam("identifier") String id) throws WrappedResponse {
 
         Dataverse dataverse = findDataverseOrDie(id);
-        if (dataverse == null) {
-            return error(Response.Status.NOT_FOUND, "Could not find dataverse based on alias supplied: " + id + ".");
-        }
-
         try {
             AuthenticatedUser user = getRequestAuthenticatedUserOrDie(crc);
             if (!user.isSuperuser()) {
@@ -2123,7 +2113,6 @@ public Response listStorageDrivers(@Context ContainerRequestContext crc, @PathPa
 
         Dataverse dv = findDataverseOrDie(id);
 
-
         /*
          * TODO: This endpoint ad GetDataverseAllowedStorageDriverCommand needs to be completed, 
          * currently it mocks things that will be required to model the behavior requested by Jim Myers,