How can I delete library from IDE

I have added some libraries which has the same header file. How can I delete them? Thanks for your reading.

How can I delete them?

What operating system? The libraries are files, just like any other file on the PC. Delete them like you would any other file.

I have added some libraries which has the same header file.

If you mean that the names of the header files are the same then you have done something very odd (and wrong) because the header files are meant to be in a directory with exactly the same name as the header file. This in turn means that you have two directories with the same name and it is, of course, impossible for them to be in the same location so at least one of them must be in the wrong place.