+ Remove last traces of CLUCENE backend support

src/indexer/kiwix-index.cpp

@@ -26,8 +26,6 @@
 #include <unistd.h>
 #endif
 
-enum supportedBackend { XAPIAN };
-
 void usage() {
     cout << "Usage: kiwix-index [--verbose] ZIM_PATH INDEX_PATH" << endl;
     exit(1);
@@ -41,7 +39,6 @@ int main(int argc, char **argv) {
   bool verboseFlag = false;
   int option_index = 0;
   int c = 0;
-  supportedBackend backend = XAPIAN;
 
   kiwix::Indexer *indexer = NULL;
 
@@ -50,24 +47,16 @@ int main(int argc, char **argv) {
 
     static struct option long_options[] = {
       {"verbose", no_argument, 0, 'v'},
-      {"backend", required_argument, 0, 'b'},
       {0, 0, 0, 0}
     };
 
     if (c != -1) {
-      c = getopt_long(argc, argv, "vb:", long_options, &option_index);
+      c = getopt_long(argc, argv, "v", long_options, &option_index);
 
       switch (c) {
 	case 'v':
 	  verboseFlag = true;
 	  break;
-	case 'b':
-	  if (!strcmp(optarg, "xapian")) {
-	    backend = XAPIAN;
-	  } else {
-	    usage();
-	  }
-	  break;
       }
     } else {
       if (optind < argc) {