Remove the Point at a Given Index from the Flattened Sequence of Covered Integers

Given a list of non-overlapping half-open intervals [start, end), where each interval covers the integers start, start+1, ..., end-1, and a 0-based index idx, find and remove the integer point at position idx in the flattened sequence of all integers covered by the intervals (ordered according to the input intervals). Return the resulting list of intervals after the removal.