Removed Vector2.tofactor

Vector2.cpp

@@ -140,7 +140,3 @@ Vector2 Vector2::Lerp(Vector2 from, Vector2 to, float f) {
   Vector2 v = from + (to - from) * f;
   return v;
 }
-
-float Vector2::ToFactor(Vector2 a, Vector2 b) {
-  return (1 - Vector2::Dot(a, b)) / 2;
-}

Vector2.h

@@ -229,8 +229,6 @@ public:
   /// matches the *to* vector Value -1 is *from* vector minus the difference
   /// between *from* and *to* etc.
   static Vector2 Lerp(Vector2 from, Vector2 to, float f);
-
-	static float ToFactor(Vector2 a, Vector2 b);
 };
 
 #endif

test/Vector2_test.cc

@@ -460,6 +460,4 @@ TEST(Vector2, Lerp) {
   EXPECT_FLOAT_EQ(Vector2::Distance(r, Vector2(-2.0, -1.0f)), 0);
 }
 
-TEST(Vector2, DISABLED_ToFactor) {}
-
 #endif