README.md in libuv-4.0.2

- old
+ new

@@ -167,16 +167,10 @@
 $ make
 $ make check
 $ make install
 ```
 
-To build with GYP, first run:
-
-```bash
-$ git clone https://chromium.googlesource.com/external/gyp build/gyp
-```
-
 ### Windows
 
 Prerequisites:
 
 * [Python 2.6 or 2.7][] as it is required
@@ -319,16 +313,9 @@
 that is detected by `autoconf`.
 [IBM documentation](http://www.ibm.com/developerworks/aix/library/au-aix_event_infrastructure/)
 describes the package in more detail.
 
 AIX support for filesystem events is not compiled when building with `gyp`.
-
-### z/OS Notes
-
-z/OS creates System V semaphores and message queues. These persist on the system
-after the process terminates unless the event loop is closed.
-
-Use the `ipcrm` command to manually clear up System V resources.
 
 ## Patches
 
 See the [guidelines for contributing][].
 