What is the purpose of SRAM in the DS1307 RTC chip and the onboard AT24C32N EEPROM chip??
for genaral purpose storing the state or result that will be remembered when mcu is powered off.   
For storing parameters that are seldom or never changed, you have to write some protection routine in MCU for make sure that you don't write in EEPROM too frequently, because the EEPROM has final number of WR cycles.  
Yes you need to remove diodes or circuits that may charge the CR2032 else it will explode. https://www.fabtolab.com/RTC-DS1307 find the remark about using non rechargable battery if this is the same module.
Who can know that on your behalf? Nobody.