nRF5340 flash memory

Hi there I am using nrf5340 for my project. As per the datasheet , it has 1MB flash memory for application core and 256KB for network core. what i want is to merge the network core into application core use it as single application core. 
Is it possible to merge both cores and get the single core with 1MB+256KB for application core.
The purpose of doing this is to get the more flash memory for image 0 and image 1, as my source code is consuming 99% of the flash memory . I am not able to add any further features in my product.

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