Remove fxcrt from sources

BUG=chromium:960288
R=thestig

Change-Id: Ie7674cd9b281478268f7c7fe096c3be7a14e43f3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/54470
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

testing/fuzzers/BUILD.gn

diff --git a/testing/fuzzers/BUILD.gn b/testing/fuzzers/BUILD.gn
index 60623c3..24b3b67 100644
--- a/testing/fuzzers/BUILD.gn
+++ b/testing/fuzzers/BUILD.gn
@@ -458,7 +458,6 @@
 
 pdfium_fuzzer("pdf_codec_rle_fuzzer") {
   sources = [
-    "../../core/fxcrt",
     "pdf_codec_rle_fuzzer.cc",
   ]
   deps = [