removed unneeded comma

hope this gets merged

src/raymath.h

@@ -329,7 +329,7 @@ RMAPI float Vector2DistanceSqr(Vector2 v1, Vector2 v2)
 }
 
 // Calculate the signed angle from v1 to v2, relative to the origin (0, 0)
-// NOTE: Coordinate system convention: positive X right, positive Y down,
+// NOTE: Coordinate system convention: positive X right, positive Y down
 // positive angles appear clockwise, and negative angles appear counterclockwise
 RMAPI float Vector2Angle(Vector2 v1, Vector2 v2)
 {