Have you tried deleting it from the IDE console?
i.e. connect to the Bangle, and enter require("Storage").erase(<filename>) directly in the left-hand side. That might still work even after it prints the LOW_MEMORY error.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Have you tried deleting it from the IDE console?
i.e. connect to the Bangle, and enter
require("Storage").erase(<filename>)
directly in the left-hand side. That might still work even after it prints theLOW_MEMORY
error.