Cleanup src/three.tsl.js (mrdoob#31109)

Author: ycw

src/Three.TSL.js

@@ -477,7 +477,6 @@ export const textureLoad = TSL.textureLoad;
 export const textureSize = TSL.textureSize;
 export const textureStore = TSL.textureStore;
 export const thickness = TSL.thickness;
-export const threshold = TSL.threshold;
 export const time = TSL.time;
 export const timerDelta = TSL.timerDelta;
 export const timerGlobal = TSL.timerGlobal;
@@ -500,8 +499,6 @@ export const transformedTangentView = TSL.transformedTangentView;
 export const transformedTangentWorld = TSL.transformedTangentWorld;
 export const transmission = TSL.transmission;
 export const transpose = TSL.transpose;
-export const tri = TSL.tri;
-export const tri3 = TSL.tri3;
 export const triNoise3D = TSL.triNoise3D;
 export const triplanarTexture = TSL.triplanarTexture;
 export const triplanarTextures = TSL.triplanarTextures;