Merge branch 'BENTLEY_materials_line_style' of https://github.com/CesiumGS/glTF into BENTLEY_materials_line_style

Author: danielzhong

extensions/2.0/Vendor/BENTLEY_materials_line_style/README.md

@@ -68,8 +68,6 @@ Because many graphics APIs do not support line primitives with a width larger th
 
 When rendering, the integer `pattern` value may be supplied to the shader as a uniform or read from a small lookup table shared among materials.
 
-For now, implementations will be limited to 16-bit integers for pattern encoding, as this is sufficient for all current use cases. 
-If a pattern uses fewer bits than the maximum supported width, unused higher bits must be set to zero.
 
 
 ## JSON Schema