Remove unused config from SparkSessionBuilder

Tests pass without it.

Author: dimas-b

integration-tests/src/main/java/org/apache/polaris/service/it/ext/SparkSessionBuilder.java

@@ -164,13 +164,9 @@ private void applySingleCatalogConfig(CatalogConfig catalog) {
 
     // Add endpoint configuration
     Preconditions.checkNotNull(catalog.endpoints, "endpoints is required");
-    builder
-        .config(
-            String.format("spark.sql.catalog.%s.uri", catalog.catalogName),
-            catalog.endpoints.catalogApiEndpoint().toString())
-        .config(
-            String.format("spark.sql.catalog.%s.header.realm", catalog.catalogName),
-            catalog.endpoints.realmId());
+    builder.config(
+        String.format("spark.sql.catalog.%s.uri", catalog.catalogName),
+        catalog.endpoints.catalogApiEndpoint().toString());
 
     // Add token configuration
     if (catalog.token != null) {