Since we're only using it on Linux now, just require poppler as a system dependency.

third_party/bson_c/test/bson_subobject_test.c

Index: third_party/bson_c/test/bson_subobject_test.c
diff --git a/third_party/bson_c/test/bson_subobject_test.c b/third_party/bson_c/test/bson_subobject_test.c
deleted file mode 100644
index 06d49c946068303d9af84d803e6e47a48341b0b0..0000000000000000000000000000000000000000
--- a/third_party/bson_c/test/bson_subobject_test.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include "test.h"
-#include "bson.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-int main() {
-    bson_iterator it[1], it2[1];
-    bson b[1];
-    bson sub[1];
-    bson copy[1];
-    bson_type type;
-
-    bson_init( b );
-    bson_append_string( b, "foo", "hello" );
-
-    {
-        bson_append_start_object( b, "o" );
-          bson_append_string( b, "bar", "goodbye" );
-        bson_append_finish_object( b );
-    }
-
-    bson_iterator_init( it, b );
-
-    bson_iterator_next( it );
-    type = bson_iterator_next( it );
-
-    ASSERT( BSON_OBJECT == type );
-
-    bson_iterator_subobject( it, sub );
-    ASSERT( sub->finished == 1 );
-
-    bson_iterator_init( it2, sub );
-
-    type = bson_iterator_next( it2 );
-    ASSERT( BSON_STRING == type );
-    type = bson_iterator_next( it2 );
-    ASSERT( BSON_EOO == type );
-
-    bson_copy( copy, sub );
-
-    ASSERT( 1 == copy->finished );
-    ASSERT( 0 == copy->stackPos );
-    ASSERT( 0 == copy->err );
-
-    bson_destroy( b );
-
-    return 0;
-}
-