Remove locale provider picked up on backport

This commit removes a locale provider that was inadvertently introduced
after a merge conflict during a backport.

Author: jasontedor

distribution/tools/launchers/src/main/java/org/elasticsearch/tools/launchers/SystemJvmOptions.java

@@ -64,7 +64,7 @@ static List<String> systemJvmOptions() {
              * Due to internationalization enhancements in JDK 9 Elasticsearch need to set the provider to COMPAT otherwise time/date
              * parsing will break in an incompatible way for some date patterns and locales.
              */
-            "-Djava.locale.providers=SPI,COMPAT"));
+            "-Djava.locale.providers=COMPAT"));
     }
 
 }