anv: revert "anv: release memory allocated by glsl types during spirv_to_nir"

anv: revert "anv: release memory allocated by glsl types during spirv_to_nir"

This reverts commit 47fc359822494935852de1e70e4d840b2fe6a25c.

Reason is that patch did not take in to account situation where we might
have both OpenGL and Vulkan using glsl_types at the same time.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>