There are two files, how to remove lines from file1 that already exist in file2?

Question

Text Processing Automation

I have two lang-files, the first one I edited, and the second is a template one, how can I remove all the lines that are no different from the lines in the template file?
For example:

This is the template file:

text1.name=Текст, который я отредактирую
text2.name=Текст, который я оставлю без изменений

I edited it:

text1.name=Текст, который я отредактировал
text2.name=Текст, который я оставлю без изменений

Bottom line:
text1.name=Текст, который я отредактировал

Maybe this can somehow be done with code, I'm not good at programming.