Remove unnecessary toolchain spec in dependency

Golden_Repo/f/Flexmalloc/Flexmalloc-16Jan24.ecoHMEM-GCCcore-11.3.0.eb

@@ -19,7 +19,7 @@ sources = [{
 checksums = [None]
 
 dependencies = [
-    ('memkind', '1.14.0', '', ('GCCcore', '11.3.0')),
+    ('memkind', '1.14.0'),
     ('binutils', '2.38'),
     ('mpc-allocator', '0.2.ecoHMEM'),
 ]