diff --git a/src/main/java/com/google/cloud/spanner/pgadapter/utils/ClientAutoDetector.java b/src/main/java/com/google/cloud/spanner/pgadapter/utils/ClientAutoDetector.java
index 458aea2cd..4c6ae560c 100644
--- a/src/main/java/com/google/cloud/spanner/pgadapter/utils/ClientAutoDetector.java
+++ b/src/main/java/com/google/cloud/spanner/pgadapter/utils/ClientAutoDetector.java
@@ -406,13 +406,6 @@ boolean isClient(List<String> orderedParameterKeys, Map<String, String> paramete
         return false;
       }
 
-      private final String prefix =
-          "SELECT version();%s"
-              + "%s"
-              + "SELECT ns.nspname, t.oid, t.typname, t.typtype, t.typnotnull, t.elemtypoid%s";
-      private final String unixPrefix = String.format(prefix, "\n", "\n", "\n");
-      private final String windowsPrefix = String.format(prefix, "\r\n", "\r\n", "\r\n");
-
       @Override
       boolean isClient(List<ParseMessage> skippedParseMessages, List<Statement> statements) {
         // The npgsql client always starts with sending a query that contains multiple statements