SkPDF: Stop `#include PREPROCESSOR_DEFINE` pattern

tests/PDFDeflateWStreamTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDeflate.h"
 #include "SkRandom.h"
 #include "Test.h"
 
 namespace {
 
-#ifdef ZLIB_INCLUDE
-    #include ZLIB_INCLUDE
-#else
-    #include "zlib.h"
-#endif
+#include "zlib.h"
 
 // Different zlib implementations use different T.
 // We've seen size_t and unsigned.
 template <typename T> void* skia_alloc_func(void*, T items, T size) {
     return sk_calloc_throw(SkToSizeT(items) * SkToSizeT(size));
 }
 
 void skia_free_func(void*, void* address) { sk_free(address); }
 
 /**
@@ skipping 128 matching lines @@
             uint8_t c;
             SkDEBUGCODE(size_t rb =)decompressed->read(&c, sizeof(uint8_t));
             SkASSERT(sizeof(uint8_t) == rb);
             if (buffer[i] != c) {
                 ERRORF(r, "Decompression failed at byte %u.", (unsigned)i);
                 break;
             }
         }
     }
 }