Remove DESCRIPTION and HOMEPAGE from PROJECT.

They are not supported on cmake-3.5, which the fuzzer uses.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 52f6cf0..a2a4c16 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,8 +4,6 @@
 
 PROJECT(libzip
   VERSION 1.6.1.1
-  DESCRIPTION "zip archive library"
-  HOMEPAGE_URL "https://libzip.org/"
   LANGUAGES C)
 
 OPTION(ENABLE_COMMONCRYPTO "Enable use of CommonCrypto" ON)