Remove unused constant

Author: mcculls

utils/src/main/java/datadog/instrument/glue/Glue.java

@@ -17,8 +17,6 @@
 public final class Glue {
   private static final String GLUE_RESOURCE_PREFIX = "/datadog/instrument/glue/";
 
-  private static final int BUFFER_SIZE = 8192;
-
   private Glue() {}
 
   /**