Remove an unused field

PiperOrigin-RevId: 178731961

src/main/java/com/google/devtools/build/lib/rules/java/JavaSemantics.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/java/JavaSemantics.java b/src/main/java/com/google/devtools/build/lib/rules/java/JavaSemantics.java
index f1be429..ebadc15 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/java/JavaSemantics.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/java/JavaSemantics.java
@@ -217,8 +217,6 @@
                 Optional.presentInstances(javaConfig.getBytecodeOptimizers().values()));
           });
 
-  String IJAR_LABEL = "//tools/defaults:ijar";
-
   String JACOCO_METADATA_PLACEHOLDER = "%set_jacoco_metadata%";
   String JACOCO_MAIN_CLASS_PLACEHOLDER = "%set_jacoco_main_class%";
   String JACOCO_JAVA_RUNFILES_ROOT_PLACEHOLDER = "%set_jacoco_java_runfiles_root%";