complete ClipPath refactor

lib/extract/extractClipping.js

@@ -1,21 +1,11 @@
 import SerializablePath from 'react-native/Libraries/ART/ARTSerializablePath';
 import clipReg from './patternReg';
 
-let clipPatterns = {};
 const clipRules = {
     evenodd: 0,
     nonzero: 1
 };
 
-function set(id, pattern) {
-    clipPatterns[id] = pattern;
-}
-
-function remove(id) {
-    delete clipPatterns[id];
-}
-
-
 export default function (props) {
     let {clipPath, clipRule} = props;
     let clippingProps = {};
@@ -26,22 +16,11 @@ export default function (props) {
         let matched = clipPath.match(clipReg);
 
         if (matched) {
-            let patternName = `${matched[1]}:${props.svgId}`;
-            let pattern = clipPatterns[patternName];
-            if (pattern) {
-                clippingProps.clipPathRef = pattern;
-            } else {
-                clippingProps = null;
-                // TODO: warn
-            }
+            clippingProps.clipPathRef = matched[1];
         } else {
             clippingProps.clipPath = new SerializablePath(clipPath).toJSON();
         }
     }
+
     return clippingProps;
 }
-
-export {
-    set,
-    remove
-};