Pendulum: Cleanup extraneous code

Pendulum/Pendulum.js

@@ -14,7 +14,8 @@ const vertex_shader = `
    {
       gl_Position = u_ModelMatrix * a_Position;
       gl_PointSize = 5.0;
-   }	`;
+   }
+`;
 
 
 const fragment_shader = `
@@ -23,9 +24,8 @@ const fragment_shader = `
    void main()
    {
       gl_FragColor = u_Color;
-   }	`;
-
-var SIDES_DELTA = 0;
+   }
+`;
 
 function main() {
    // Retrieve <canvas> element
@@ -45,7 +45,7 @@ function main() {
    }
 
    // create a pendulum object
-   var pendulum = new Pendulum({ angle: 0, length: PEN_LENGTH, radius: BOB_RADIUS });
+   var pendulum = new Pendulum({ length: PEN_LENGTH, radius: BOB_RADIUS });
    pendulum.init(gl);
 
    // Specify the color for clearing <canvas>