message: Remove non-existing option from build help.
diff: @@ -31,8 +31,6 @@ function print_help {
  echo " Platform(s) to build, defaults to desktop."
  echo " Building for Android or iOS will automatically generate / download"
  echo " the toolchains if needed and perform a partial desktop build."
  - echo " -r"
  - echo " Restrict the number of make/ninja jobs."
  echo " -t"
  echo " Generate the Android toolchain, requires \$ANDROID_HOME to be set."
  echo " -u"
  