Cycles: Remove limits on the Sky texture's sun rotation

For animation/driver purposes, being able to go outside of the 0-360
range makes things easier.

Differential Revision: https://developer.blender.org/D8091

source/blender/makesrna/intern/rna_nodetree.c

@@ -4461,7 +4461,6 @@ static void def_sh_tex_sky(StructRNA *srna)
 
   prop = RNA_def_property(srna, "sun_rotation", PROP_FLOAT, PROP_ANGLE);
   RNA_def_property_ui_text(prop, "Sun Rotation", "Rotation of sun around zenith");
-  RNA_def_property_range(prop, 0.0f, 2.0f * M_PI);
   RNA_def_property_float_default(prop, 0.0f);
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");