Update boards.txt

Updated erase flash

Author: microbotsio

boards.txt

@@ -39688,4 +39688,9 @@ codecell.menu.DebugLevel.debug.build.code_debug=4
 codecell.menu.DebugLevel.verbose=Verbose
 codecell.menu.DebugLevel.verbose.build.code_debug=5
 
+codecell.menu.EraseFlash.none=Disabled
+codecell.menu.EraseFlash.none.upload.erase_cmd=
+codecell.menu.EraseFlash.all=Enabled
+codecell.menu.EraseFlash.all.upload.erase_cmd=-e
+
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