Revert "[jvm-packages] update rabit, surface new changes to spark, add parity and failure tests (#4876)" (#4965)

This reverts commit 86ed01c4bb.

jvm-packages/create_jni.py

@@ -18,7 +18,7 @@ CONFIG = {
     "USE_HDFS": "OFF",
     "USE_AZURE": "OFF",
     "USE_S3": "OFF",
-    "RABIT_MOCK": "OFF",
+
     "USE_CUDA": "OFF",
     "JVM_BINDINGS": "ON"
 }
@@ -68,7 +68,6 @@ def normpath(path):
 
 
 if __name__ == "__main__":
-    CONFIG["RABIT_MOCK"] = str(sys.argv[1])
     if sys.platform == "darwin":
         # Enable of your compiler supports OpenMP.
         CONFIG["USE_OPENMP"] = "OFF"