Remove NRF51/52 targets

MarceloSalazar · Marcelo Salazar · commit 21e364e0624e · 2020-04-20T16:55:34.000+01:00
diff --git a/targets/targets.json b/targets/targets.json
@@ -6296,7 +6296,7 @@
                 "std"
             ]
         }
-    }
+    },
     "DISCO_L476VG": {
         "components_add": [
             "QSPIF",
