Set checksum to None.

Golden_Repo/g/gpi-2/gpi2-deepsea-GCC-11.3.0.eb

@@ -19,7 +19,8 @@ sources = [{
         'keep_git_dir': True,
     },
 }]
-checksums = ['c3f7bb9421712ce494f86c6abfc5a8b995aff52786e697654be9e2a5d59c6567']
+
+checksums = [None]
 
 builddependencies = [
     ('binutils', '2.38')