Remove unused Polymer elements

third_party/polymer/v1_0/components-chromium/paper-card/paper-card-extracted.js

-Polymer({
-      is: 'paper-card',
-
-      properties: {
-        /**
-         * The title of the card.
-         */
-        heading: {
-          type: String,
-          value: '',
-          observer: '_headingChanged'
-        },
-
-        /**
-         * The url of the title image of the card.
-         */
-        image: {
-          type: String,
-          value: ''
-        },
-
-        /**
-         * When `true`, any change to the image url property will cause the
-         * `placeholder` image to be shown until the image is fully rendered.
-         */
-        preloadImage: {
-          type: Boolean,
-          value: false
-        },
-
-        /**
-         * When `preloadImage` is true, setting `fadeImage` to true will cause the
-         * image to fade into place.
-         */
-        fadeImage: {
-          type: Boolean,
-          value: false
-        },
-
-        /**
-         * The z-depth of the card, from 0-5.
-         */
-        elevation: {
-          type: Number,
-          value: 1,
-          reflectToAttribute: true
-        },
-
-        /**
-         * Set this to true to animate the card shadow when setting a new
-         * `z` value.
-         */
-        animatedShadow: {
-          type: Boolean,
-          value: false
-        },
-
-        /**
-         * Read-only property used to pass down the `animatedShadow` value to
-         * the underlying paper-material style (since they have different names).
-         */
-        animated: {
-          type: Boolean,
-          reflectToAttribute: true,
-          readOnly: true,
-          computed: '_computeAnimated(animatedShadow)'
-        }
-      },
-
-      _headingChanged: function(heading) {
-        var label = this.getAttribute('aria-label');
-        this.setAttribute('aria-label', heading);
-      },
-
-      _computeHeadingClass: function(image) {
-        var cls = 'title-text';
-        if (image)
-          cls += ' over-image';
-        return cls;
-      },
-
-      _computeAnimated: function(animatedShadow) {
-        return animatedShadow;
-      }
-    });