code: function( body ){
  
              var bodies = this._bodies;
  
              if (body){
  
                  for ( var i = 0, l = bodies.length; i < l; ++i ){
  
                      if (body === bodies[ i ]){
  
                          bodies.splice( i, 1 );
                          body.setWorld( null );
  
                          this.emit( 'remove:body', {
                              body: body
                          });
  
                          break;
                      }
                  }
              }
  
              return this;
          }
docs: chainable
  Physics.world#removeBody( body ) -> this
  - body (Body): The body to remove
  
  Remove a body from the world