Fix warnings in examples (#353)

Author: mpenick

cpp-driver/examples/perf/perf.c

@@ -138,8 +138,6 @@ CassCluster* create_cluster(const char* hosts) {
   cass_cluster_set_num_threads_io(cluster, NUM_IO_WORKER_THREADS);
   cass_cluster_set_queue_size_io(cluster, 10000);
   cass_cluster_set_core_connections_per_host(cluster, 1);
-  cass_cluster_set_max_connections_per_host(cluster, 2);
-  cass_cluster_set_max_requests_per_flush(cluster, 10000);
   return cluster;
 }
 

examples/date_range/date_range.c

@@ -208,11 +208,8 @@ CassError insert_into_collections(CassSession* session, const char* key, const D
   const CassDataType* udt_type = NULL;
   CassUserType* udt = NULL;
 
-  const char** item = NULL;
   const char* query =
       "INSERT INTO examples.drcoll (key, coll_value, tuple_value, udt_value) VALUES (?, ?, ?, ?);";
-  int ind = 0;
-
   statement = cass_statement_new(query, 4);
 
   cass_statement_bind_string(statement, 0, key);

examples/geotypes/geotypes.c

@@ -296,16 +296,13 @@ void select_line_string(CassSession* session, const char* key) {
   if (cass_future_error_code(future) == CASS_OK) {
     const CassResult* result = cass_future_get_result(future);
     if (result && cass_result_row_count(result) > 0) {
-      cass_uint32_t i, num_points;
       const CassRow* row = cass_result_first_row(result);
       const CassValue* value = cass_row_get_column_by_name(row, "linestring");
 
       DseLineStringIterator* iterator = dse_line_string_iterator_new();
 
       dse_line_string_iterator_reset(iterator, value);
 
-      num_points = dse_line_string_iterator_num_points(iterator);
-
       printf("%s: ", key);
       print_line_string(iterator);
       printf(")\n");

examples/gssapi/gssapi_proxy.c

@@ -121,7 +121,6 @@ void connect_and_run(const char* hosts, const char* proxy_user) {
 
 int main(int argc, char* argv[]) {
   /* Setup and connect to cluster */
-  CassFuture* connect_future = NULL;
   char* hosts = "127.0.0.1";
   if (argc > 1) {
     hosts = argv[1];

examples/proxy_execution/proxy_execution.c

@@ -88,7 +88,6 @@ CassError connect_session(CassSession* session, const CassCluster* cluster) {
 
 int main(int argc, char* argv[]) {
   /* Setup and connect to cluster */
-  CassFuture* connect_future = NULL;
   CassCluster* cluster = cass_cluster_new();
   CassSession* session = cass_session_new();
   char* hosts = "127.0.0.1";