remove duplicated sample (already have a gm)

gyp/SampleApp.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 {
   'includes': [
     'apptype_console.gypi',
   ],
   'targets': [
@@ skipping 46 matching lines @@
         '../samplecode/SampleCode.h',
         '../samplecode/SampleColorFilter.cpp',
         '../samplecode/SampleComplexClip.cpp',
         '../samplecode/SampleConcavePaths.cpp',
         '../samplecode/SampleCull.cpp',
         '../samplecode/SampleDegenerateTwoPtRadials.cpp',
         '../samplecode/SampleDither.cpp',
         '../samplecode/SampleDitherBitmap.cpp',
         '../samplecode/SampleEffects.cpp',
         '../samplecode/SampleEmboss.cpp',
-        '../samplecode/SampleEmptyPath.cpp',
         '../samplecode/SampleEncode.cpp',
         '../samplecode/SampleFatBits.cpp',
         '../samplecode/SampleFillType.cpp',
         '../samplecode/SampleFilter.cpp',
         '../samplecode/SampleFilter2.cpp',
         '../samplecode/SampleFilterQuality.cpp',
         '../samplecode/SampleFilterFuzz.cpp',
         '../samplecode/SampleFontCache.cpp',
         '../samplecode/SampleFontScalerTest.cpp',
         '../samplecode/SampleFuzz.cpp',
@@ skipping 179 matching lines @@
           ],
         }],
         [ 'not skia_pdf', {
           'dependencies!': [ 'pdf.gyp:pdf' ],
           'dependencies': [ 'pdf.gyp:nopdf' ],
         }],
       ],
     },
   ],
 }