Clean up unused variables in `TextureEditor`

src/UserInterface/TextureEditor.cpp

@@ -76,12 +76,6 @@ void TextureEditor::update(ofEventArgs & args){
 				int rows = s->getGridRows();
 				int cols = s->getGridCols();
 				int vertsPerRow = cols + 1;
-				int vertsPerCol = rows + 1;
-		
-				int a = 0;
-				int b = cols;
-				int c = (rows * vertsPerRow) + (vertsPerRow - 1);
-				int d = (rows * vertsPerRow);
 				
 				// Distance between horizontal tex coords
 				float sx = joints[0]->position.x / textureSize.x;