[MINOR] Remove unused throw exception in SecureHadoopCatalogOperation…

…s#testConnection (apache#5607)

### What changes were proposed in this pull request?

the `testConnection` throw Exception is redundant in this method, so we
should remove it.

### Why are the changes needed?
update the code quality

### Does this PR introduce _any_ user-facing change?
n/a

### How was this patch tested?
n/a

catalogs/catalog-hadoop/src/main/java/org/apache/gravitino/catalog/hadoop/SecureHadoopCatalogOperations.java

@@ -243,8 +243,7 @@ public void testConnection(
       Catalog.Type type,
       String provider,
       String comment,
-      Map<String, String> properties)
-      throws Exception {
+      Map<String, String> properties) {
     hadoopCatalogOperations.testConnection(catalogIdent, type, provider, comment, properties);
   }