[gnome-photos] base-item: Remove useless assertion

[Debarshi Ray <debarshir src gnome org>]

commit 911b895b6b1334236742d0cfde0e213ddd612b4e
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Feb 23 15:22:27 2015 +0100

    base-item: Remove useless assertion
    
    g_thread_pool_new always returns a non-NULL value, and the GError is
    not used for non-exclusive pools. Therefore, there is nothing for us to
    check.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=740425

 src/photos-base-item.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 6069a00..88547a3 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -1094,7 +1094,6 @@ photos_base_item_class_init (PhotosBaseItemClass *class)
                                              1,
                                              FALSE,
                                              NULL);
-  g_assert (create_thumbnail_pool != NULL);
 }