depends, doc: No need to specify general requirement

CMake is no longer required solely for `libmultiprocess`.

depends/README.md

@@ -115,7 +115,7 @@ The following can be set when running make: `make FOO=bar`
 - `NO_UPNP`: Don't download/build/cache packages needed for enabling UPnP
 - `NO_NATPMP`: Don't download/build/cache packages needed for enabling NAT-PMP
 - `NO_USDT`: Don't download/build/cache packages needed for enabling USDT tracepoints
-- `MULTIPROCESS`: Build libmultiprocess (experimental, requires CMake)
+- `MULTIPROCESS`: Build libmultiprocess (experimental)
 - `DEBUG`: Disable some optimizations and enable more runtime checking
 - `HOST_ID_SALT`: Optional salt to use when generating host package ids
 - `BUILD_ID_SALT`: Optional salt to use when generating build package ids