libs: delete vendored zlib, it was only used by PNaCl because of prec…

…ompiled freetype when building cgame

CMakeLists.txt

@@ -640,15 +640,8 @@ if ( USE_STATIC_LIBS )
 endif()
 
 # zlib
-if (BUILD_CLIENT OR BUILD_TTY_CLIENT OR BUILD_SERVER OR BUILD_DUMMY_APP OR (BUILD_CGAME AND NACL AND NOT USE_NACL_SAIGO))
-    if (NOT NACL)
-        find_package(ZLIB REQUIRED)
-    else()
-        add_library(srclibs-zlib EXCLUDE_FROM_ALL ${ZLIBLIST})
-        set_target_properties(srclibs-zlib PROPERTIES POSITION_INDEPENDENT_CODE ${GAME_PIE} FOLDER "libs")
-        set(ZLIB_INCLUDE_DIRS ${LIB_DIR}/zlib)
-        set(ZLIB_LIBRARIES srclibs-zlib)
-    endif()
+if (BUILD_CLIENT OR BUILD_TTY_CLIENT OR BUILD_SERVER OR BUILD_DUMMY_APP)
+    find_package(ZLIB REQUIRED)
     set(LIBS_BASE ${LIBS_BASE} ${ZLIB_LIBRARIES})
     include_directories(${ZLIB_INCLUDE_DIRS})
 endif()