fuzzers: avoid double initialization in CCodec_ModuleMgr

testing/fuzzers/pdf_fuzzer_init.cc is already doing a full library
init, so the call here was redundant. It was a silent no-op prior to
the latest module init changes, but now is caught.

Bug: chromium:970137
Change-Id: I24bf57d18395a3e620af3a6cb03cf88748c9e255
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/55530
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/testing/fuzzers/xfa_codec_fuzzer.h b/testing/fuzzers/xfa_codec_fuzzer.h
index 2729963..9a44cc9 100644
--- a/testing/fuzzers/xfa_codec_fuzzer.h
+++ b/testing/fuzzers/xfa_codec_fuzzer.h
@@ -37,16 +37,7 @@
 class XFACodecFuzzer {
  public:
   static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
-    CCodec_ModuleMgr::Create();
-    int sts = FuzzInternal(CCodec_ModuleMgr::GetInstance(), data, size, type);
-    CCodec_ModuleMgr::Destroy();
-    return sts;
-  }
-
-  static int FuzzInternal(CCodec_ModuleMgr* mgr,
-                          const uint8_t* data,
-                          size_t size,
-                          FXCODEC_IMAGE_TYPE type) {
+    auto* mgr = CCodec_ModuleMgr::GetInstance();
 #ifdef PDF_ENABLE_XFA_BMP
     mgr->SetBmpModule(pdfium::MakeUnique<CCodec_BmpModule>());
 #endif  // PDF_ENABLE_XFA_BMP