engine: ref: remove direction vectors from Ref API, renderers calculate them from viewangles to local data anyway

engine/client/ref_common.c

@@ -55,7 +55,6 @@ void GL_RenderFrame( const ref_viewpass_t *rvp )
 
 	VectorCopy( rvp->vieworigin, refState.vieworg );
 	VectorCopy( rvp->viewangles, refState.viewangles );
-	AngleVectors( refState.viewangles, refState.vforward, refState.vright, refState.vup );
 
 	ref.dllFuncs.GL_RenderFrame( rvp );
 }

engine/ref_api.h

@@ -102,7 +102,6 @@ typedef struct ref_globals_s
 
 	vec3_t vieworg;
 	vec3_t viewangles;
-	vec3_t vforward, vright, vup;
 
 	// todo: fill this without engine help
 	// move to local