Cleanup a few symlinks in setup_links.py

It seems these are no longer valid/needed.

R=phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/1426483008 .

Cr-Commit-Position: refs/heads/master@{#10503}

setup_links.py

@@ -34,8 +34,6 @@ import textwrap
 DIRECTORIES = [
   'build',
   'buildtools',
-  'google_apis',  # Needed by build/common.gypi.
-  'net',
   'testing',
   'third_party/binutils',
   'third_party/boringssl',
@@ -84,7 +82,6 @@ if 'android' in target_os:
   DIRECTORIES += [
     'base',
     'third_party/android_platform',
-    'third_party/android_testrunner',
     'third_party/android_tools',
     'third_party/appurify-python',
     'third_party/ashmem',
@@ -99,7 +96,6 @@ if 'android' in target_os:
     'third_party/robolectric',
     'tools/android',
     'tools/grit',
-    'tools/relocation_packer'
   ]
 if 'ios' in target_os:
   DIRECTORIES.append('third_party/class-dump')