chore($parse): remove simpleGetter optimizations as they're no longer valid

Closes #8101

Author: rodyhaddad

src/ng/parse.js

@@ -985,26 +985,6 @@ function cspSafeGetterFn(key0, key1, key2, key3, key4, fullExp, options) {
         };
 }
 
-function simpleGetterFn1(key0, fullExp) {
-  ensureSafeMemberName(key0, fullExp);
-
-  return function simpleGetterFn1(scope, locals) {
-    if (scope == null) return undefined;
-    return ((locals && locals.hasOwnProperty(key0)) ? locals : scope)[key0];
-  };
-}
-
-function simpleGetterFn2(key0, key1, fullExp) {
-  ensureSafeMemberName(key0, fullExp);
-  ensureSafeMemberName(key1, fullExp);
-
-  return function simpleGetterFn2(scope, locals) {
-    if (scope == null) return undefined;
-    scope = ((locals && locals.hasOwnProperty(key0)) ? locals : scope)[key0];
-    return scope == null ? undefined : scope[key1];
-  };
-}
-
 function getterFn(path, options, fullExp) {
   // Check whether the cache has this getter already.
   // We can use hasOwnProperty directly on the cache because we ensure,
@@ -1017,13 +997,8 @@ function getterFn(path, options, fullExp) {
       pathKeysLength = pathKeys.length,
       fn;
 
-  // When we have only 1 or 2 tokens, use optimized special case closures.
   // http://jsperf.com/angularjs-parse-getter/6
-  if (!options.unwrapPromises && pathKeysLength === 1) {
-    fn = simpleGetterFn1(pathKeys[0], fullExp);
-  } else if (!options.unwrapPromises && pathKeysLength === 2) {
-    fn = simpleGetterFn2(pathKeys[0], pathKeys[1], fullExp);
-  } else if (options.csp) {
+  if (options.csp) {
     if (pathKeysLength < 6) {
       fn = cspSafeGetterFn(pathKeys[0], pathKeys[1], pathKeys[2], pathKeys[3], pathKeys[4], fullExp,
                           options);