Remove simple build profile

This was inadvertently added in d163f60e34 (see #2075).  Thanks @probins for the heads up.

simple.json

@@ -1,25 +0,0 @@
-{
-  "exports": [],
-  "src": ["src/**/*.js", "examples/simple.js"],
-  "compile": {
-    "js": ["externs/olx.js"],
-    "externs": [
-      "externs/example.js",
-      "externs/bingmaps.js",
-      "externs/geojson.js",
-      "externs/oli.js",
-      "externs/proj4js.js",
-      "externs/tilejson.js",
-      "externs/topojson.js",
-      "externs/vbarray.js"
-    ],
-    "define": [
-      "goog.dom.ASSUME_STANDARDS_MODE=true",
-      "goog.DEBUG=false"
-    ],
-    "compilation_level": "ADVANCED_OPTIMIZATIONS",
-    "output_wrapper": "(function(){%output%})();",
-    "use_types_for_optimization": true,
-    "manage_closure_dependencies": true
-  }
-}