Removed Samples and Tests project generation from Windows Store builds.

build/all.gyp

@@ -11,9 +11,20 @@
             'dependencies':
             [
                 '../src/angle.gyp:*',
+            ],
+            'conditions':
+            [
+                # Generate tests and sample projects for classic desktop
+                # builds only.
+                ['angle_build_winrt==0',
+                {
+                    'dependencies':
+                    [
                         '../samples/samples.gyp:*',
                         '../tests/tests.gyp:*',
                     ],
+                }],
+            ],
         },
     ],
 }