Tests: Avoid creating world-writable paths

These were added by commit 337bc5662c (if(): add operators IS_READABLE,
IS_WRITABLE and IS_EXECUTABLE., 2023-10-21) but are not actually
necessary.

Tests/RunCMake/if/FilePermissions.cmake

@@ -7,7 +7,7 @@ file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/readable.txt" "foo")
 file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/readable.txt" PERMISSIONS OWNER_READ GROUP_READ WORLD_READ)
 
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/writable.txt" "foo")
-file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/writable.txt" PERMISSIONS OWNER_WRITE GROUP_WRITE WORLD_WRITE)
+file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/writable.txt" PERMISSIONS OWNER_WRITE GROUP_WRITE)
 
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/executable.txt" "foo")
 file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/executable.txt" PERMISSIONS OWNER_EXECUTE GROUP_EXECUTE WORLD_EXECUTE)
@@ -23,7 +23,7 @@ if(NOT WIN32)
   file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/readable-dir" PERMISSIONS OWNER_READ GROUP_READ WORLD_READ)
 
   file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/writable-dir")
-  file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/writable-dir" PERMISSIONS OWNER_WRITE GROUP_WRITE WORLD_WRITE)
+  file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/writable-dir" PERMISSIONS OWNER_WRITE GROUP_WRITE)
 
   file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/executable-dir")
   file(CHMOD "${CMAKE_CURRENT_BINARY_DIR}/executable-dir" PERMISSIONS OWNER_EXECUTE GROUP_EXECUTE WORLD_EXECUTE)