diff --git a/lib/java_buildpack/framework/cloud_sql_security_provider.rb b/lib/java_buildpack/framework/cloud_sql_security_provider.rb
index 740d5de42b..2c2acefe0b 100644
--- a/lib/java_buildpack/framework/cloud_sql_security_provider.rb
+++ b/lib/java_buildpack/framework/cloud_sql_security_provider.rb
@@ -58,7 +58,6 @@ def detect
 
       protected
 
-      # (see JavaBuildpack::Component::VersionedDependencyComponent#supports?)
       def supports?
         @application.services.one_service? FILTER, 'sslrootcert', 'sslcert', 'sslkey'
       end
@@ -90,10 +89,6 @@ def add_trusted_certificate(trusted_certificate)
         shell "#{keytool} -import -trustcacerts -cacerts -storepass changeit -noprompt -alias CloudSQLCA -file #{cert.path}"
       end
 
-      def ext_dir
-        @droplet.sandbox + 'ext'
-      end
-
       def keystore
         @droplet.sandbox + 'cloud-sql-keystore.jks'
       end