[vte] spawn: Don't change PWD when no cwd is given

[Christian Persch <chpe src gnome org>]

commit 423c2ff47f44810adcb8fd6591c2bb93e759618f
Author: Christian Persch <chpe src gnome org>
Date:   Fri May 1 11:05:04 2020 +0200

    spawn: Don't change PWD when no cwd is given

 src/spawn.cc | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/spawn.cc b/src/spawn.cc
index e7188661..ced0ba7a 100644
--- a/src/spawn.cc
+++ b/src/spawn.cc
@@ -249,8 +249,6 @@ merge_environ(char** envp /* consumed */,
          */
         if (cwd)
                 g_hash_table_replace(table, g_strdup("PWD"), g_strdup(cwd));
-        else
-                g_hash_table_remove(table, "PWD");
 
         auto array = g_ptr_array_sized_new(g_hash_table_size(table) + 1);