Bug 1243030 - disable v8_7 for talos. r=wlach

--HG--
extra : commitid : LU4Rh8DCWzW
extra : rebase_source : feb1fe981606c9d90229cce495591b668c6f603b
extra : amend_source : e96624a73e22d1859bf805b978f69b09d1dedd65

testing/talos/talos.json

@@ -15,10 +15,10 @@
             "talos_options": ["--e10s"]
         },
         "dromaeojs": {
-            "tests": ["dromaeo_css", "kraken", "v8_7"]
+            "tests": ["dromaeo_css", "kraken"]
         },
         "dromaeojs-e10s": {
-            "tests": ["dromaeo_css", "kraken", "v8_7"],
+            "tests": ["dromaeo_css", "kraken"],
             "talos_options": ["--e10s"]
         },
         "other": {