Revert unnecessary changes

Author: Kontinuation

.gitignore

@@ -25,6 +25,4 @@ target
 Cargo.lock
 
 # For files generated by build.rs
-tmp
-
-hadoop-*
+tmp

c_src/libhdfs/exception.c

@@ -175,41 +175,6 @@ int printExceptionAndFreeV(JNIEnv *env, jthrowable exc, int noPrintFlags,
         excErrno = EINTERNAL;
     }
 
-    // Print exception using Java System.out.println and printStackTrace
-    {
-        jclass systemClass = (*env)->FindClass(env, "java/lang/System");
-        if (systemClass) {
-            jfieldID outField = (*env)->GetStaticFieldID(env, systemClass, "out", "Ljava/io/PrintStream;");
-            if (outField) {
-                jobject outStream = (*env)->GetStaticObjectField(env, systemClass, outField);
-                if (outStream) {
-                    jclass printStreamClass = (*env)->FindClass(env, "java/io/PrintStream");
-                    if (printStreamClass) {
-                        jmethodID printlnMethod = (*env)->GetMethodID(env, printStreamClass, "println", "(Ljava/lang/String;)V");
-                        if (printlnMethod) {
-                            jstring message = (*env)->NewStringUTF(env, "Exception occurred:");
-                            (*env)->CallVoidMethod(env, outStream, printlnMethod, message);
-                            (*env)->DeleteLocalRef(env, message);
-                        }
-                        (*env)->DeleteLocalRef(env, printStreamClass);
-                    }
-                    (*env)->DeleteLocalRef(env, outStream);
-                }
-            }
-            (*env)->DeleteLocalRef(env, systemClass);
-        }
-        
-        // Call printStackTrace on the exception
-        jclass excClass = (*env)->GetObjectClass(env, exc);
-        if (excClass) {
-            jmethodID printStackTraceMethod = (*env)->GetMethodID(env, excClass, "printStackTrace", "()V");
-            if (printStackTraceMethod) {
-                (*env)->CallVoidMethod(env, exc, printStackTraceMethod);
-            }
-            (*env)->DeleteLocalRef(env, excClass);
-        }
-    }
-
     // We don't want to use ExceptionDescribe here, because that requires a
     // pending exception. Instead, use ExceptionUtils.
     rootCause = getExceptionUtilString(env, exc, "getRootCauseMessage");