utils: update_resources: remove temp_file

Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>

utils/update_resources.py

diff --git a/utils/update_resources.py b/utils/update_resources.py
index ef8bc54..3b2209d 100755
--- a/utils/update_resources.py
+++ b/utils/update_resources.py
@@ -67,6 +67,8 @@
         with open(tmp_file, "r") as fp:
             pins_json = json.load(fp)
 
+        os.remove(tmp_file)
+
         clk_pins = pins_json["clk_pins"].split()
         data_pins = pins_json["data_pins"].split()
         pins = {