remove unnecessary Matrix4 unit tests.

test/unit/math/Matrix4.js

@@ -217,42 +217,6 @@ test( "transpose", function() {
 	ok( matrixEquals4( b, c ), "Passed!" ); 
 });
 
-// this function is a duplicate of that in ArrowHelper.
-var makeBasis = function ( axis ) {
-
-	var matrix = new THREE.Matrix4();
-
-	if( axis.distanceTo( new THREE.Vector3( 0, 1, 0 ) ) < 0.001 ) {
-		matrix.identity();
-	}
-	else if( axis.distanceTo( new THREE.Vector3( 0, -1, 0 ) ) < 0.001 ) {
-		matrix.makeRotationZ( Math.PI );
-	}
-	else {
-		var perpendicularAxis = new THREE.Vector3( 0, 1, 0 ).crossSelf( axis );
-		perpendicularAxis.normalize();
-		var radians = Math.acos( new THREE.Vector3( 0, 1, 0 ).dot( perpendicularAxis ) );
-		matrix.makeRotationAxis( perpendicularAxis, radians );
-	}
-
-	return matrix;
-}
-
-test( "makeBasis", function() {
-	var axes = [
-		new THREE.Vector3( 1, 0, 0 ), new THREE.Vector3( 0, 1, 0 ), new THREE.Vector3( 0, 0, 1 ),
-		new THREE.Vector3( -1, 0, 0 ), new THREE.Vector3( 0, -1, 0 ), new THREE.Vector3( 0, 0, -1 )
-	];
-
-	var v = new THREE.Vector3( 0, 1, 0 );
-	for( var i = 0, il = axes.length; i < il; i ++ ) {
-		var v0 = axes[i];
-		var m = makeBasis( v0 );
-		var v1 = m.multiplyVector3( v.clone() );
-		ok( v1.distanceTo( v0 ) < 0.001, "Passed!" );
-	}
-});
-
 test( "clone", function() {
 	var a = new THREE.Matrix4( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
 	var b = a.clone();