I tried your code in 2.0b8 with and without the import statement and in both cases it worked without error.
If you run the code in Processing 1.5.1 the import statement is redundant because the P3D reneder (in 1.5.1) was not based on OpenGL so you don't get the error.
In Processing 2.0b8 - P2D, P3D and OPENGL are all based on OpenGL, so since you get this error I suspect that you need to update your OpenGL drivers for your Dell.
If you run the code in Processing 1.5.1 the import statement is redundant because the P3D reneder (in 1.5.1) was not based on OpenGL so you don't get the error.
In Processing 2.0b8 - P2D, P3D and OPENGL are all based on OpenGL, so since you get this error I suspect that you need to update your OpenGL drivers for your Dell.