Remove max anisotropic level draw test

Remove max anisotropic level draw test

Based on EXT_texture_filter_anisotropic where it says : "Should an
implementation-defined limit for the maximum maximum degree of
anisotropy be get-able?

RESOLUTION:  YES. But you should not assume that a high maximum
maximum degree of anisotropy implies anything about texture
filtering performance or quality."

affects:

KHR-GL44.texture_filter_anisotropic.drawing
KHR-GLES3.texture_filter_anisotropic.drawing

Components: OpenGL

VK-GL-CTS issue: 637

Change-Id: I2c5efcc1553f184f3995cda7d15385095055560b