libGLU never came with the driver. Any libGLU is going to be written to only depend on GL calls; libGL does come with the driver.
You can use any GLU implementation (for example, the one that comes with XFree86 or the one that comes with Mesa) that you want. At least, that was the case back in Mesa 4.something, last time I tried using its GLU -- I've been using X's GLU ever since then.
Don't tell me you deleted your libGLU.so files expecting the driver to recreate them...