mesa: remove initialized field from uniform storage

The only place this was used was in a gallium debug function that
had to be manually enabled.

Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/compiler/glsl/link_uniforms.cpp

@@ -799,7 +799,6 @@ private:
 
       this->uniforms[id].name = ralloc_strdup(this->uniforms, name);
       this->uniforms[id].type = base_type;
-      this->uniforms[id].initialized = 0;
       this->uniforms[id].num_driver_storage = 0;
       this->uniforms[id].driver_storage = NULL;
       this->uniforms[id].atomic_buffer_index = -1;