remove old (not anymore working) way of setting start address of firmware

Author: Jason2866

builder/main.py

@@ -132,7 +132,7 @@ def _parse_partitions(env):
 
     result = []
     next_offset = 0
-    app_offset = int(board.get("upload.offset_address", "0x10000"), 16) # default 0x10000
+    app_offset = 0x10000 # default address for firmware
     with open(partitions_csv) as fp:
         for line in fp.readlines():
             line = line.strip()