Remove unused checklicenses suppressions.

tools/checklicenses/checklicenses.py

Index: tools/checklicenses/checklicenses.py
===================================================================
--- tools/checklicenses/checklicenses.py	(revision 119053)
+++ tools/checklicenses/checklicenses.py	(working copy)
@@ -85,9 +85,6 @@
 
 
 PATH_SPECIFIC_WHITELISTED_LICENSES = {
-    'base/third_party/dmg_fp': [  # http://crbug.com/98086
-        'UNKNOWN',
-    ],
     'base/third_party/icu': [  # http://crbug.com/98087
         'UNKNOWN',
     ],
@@ -162,19 +159,9 @@
         'UNKNOWN',
     ],
 
-    # http://code.google.com/p/open-vcdiff/issues/detail?id=31
-    'sdch/open-vcdiff': [
-        'UNKNOWN',
-    ],
-
     'third_party/WebKit': [
         'UNKNOWN',
     ],
-    'third_party/WebKit/Source/ThirdParty/ANGLE/src/compiler': [
-        # http://crbug.com/105232
-        'GPL',
-        'GPL (v3 or later)',
-    ],
     'third_party/WebKit/Source/JavaScriptCore/tests/mozilla': [
         'GPL',
         'GPL (unversioned/unknown version)',
@@ -188,9 +175,6 @@
         'UNKNOWN',
     ],
 
-    'third_party/ashmem/ashmem.h': [  # http://crbug.com/98116
-        'UNKNOWN',
-    ],
     'third_party/bsdiff/mbsdiff.cc': [
         'UNKNOWN',
     ],
@@ -253,9 +237,6 @@
     'third_party/libjpeg_turbo': [  # http://crbug.com/98314
         'UNKNOWN',
     ],
-    'third_party/libphonenumber/cpp/src': [  # http://crbug.com/98316
-        'UNKNOWN',
-    ],
     'third_party/libpng': [  # http://crbug.com/98318
         'UNKNOWN',
     ],