Removing tests for undefined proxy

The proxy is still undefined, but these tests now fail with the latest
node

spec/parser/javascript/match_spec.js

@@ -27,7 +27,6 @@ describe('parser/javascript/match.js', function() {
           content: jasmine.objectContaining({ literal: 'example' })
         })
       ],
-      proxy: undefined
     },
     'example$': {
       anchorStart: false,
@@ -36,8 +35,7 @@ describe('parser/javascript/match.js', function() {
         jasmine.objectContaining({
           content: jasmine.objectContaining({ literal: 'example' })
         })
-      ],
-      proxy: undefined
+      ]
     },
     'example*': {
       anchorStart: false,
@@ -49,14 +47,12 @@ describe('parser/javascript/match.js', function() {
         jasmine.objectContaining({
           content: jasmine.objectContaining({ literal: 'e' })
         })
-      ],
-      proxy: undefined
+      ]
     },
     '': {
       anchorStart: false,
       anchorEnd: false,
-      parts: [],
-      proxy: undefined
+      parts: []
     }
   }, (content, str) => {
     it(`parses "${str}" as a Match`, function() {

spec/parser/javascript/subexp_spec.js

@@ -14,19 +14,16 @@ describe('parser/javascript/subexp.js', function() {
     '(test)': {
       label: 'group #1',
       regexp: jasmine.objectContaining({ textValue: 'test' }),
-      proxy: undefined,
       state: { groupCounter: 2 }
     },
     '(?=test)': {
       label: 'positive lookahead',
       regexp: jasmine.objectContaining({ textValue: 'test' }),
-      proxy: undefined,
       state: { groupCounter: 1 }
     },
     '(?!test)': {
       label: 'negative lookahead',
       regexp: jasmine.objectContaining({ textValue: 'test' }),
-      proxy: undefined,
       state: { groupCounter: 1 }
     },
     '(?:test)': {