Remove SKTLS files from BUILD

These are currently empty and being deleted.

Change-Id: I830f1216b8987d7c056b742e8ae476355553abca
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/96752
Auto-Submit: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/skia/BUILD.gn b/skia/BUILD.gn
index ef014d5..a3e9bd0 100644
--- a/skia/BUILD.gn
+++ b/skia/BUILD.gn
@@ -272,14 +272,10 @@
       "//third_party/skia/src/ports/SkOSFile_win.cpp",
       "//third_party/skia/src/ports/SkRemotableFontMgr_win_dw.cpp",
       "//third_party/skia/src/ports/SkScalerContext_win_dw.cpp",
-      "//third_party/skia/src/ports/SkTLS_win.cpp",
       "//third_party/skia/src/ports/SkTypeface_win_dw.cpp",
     ]
   } else {
-    sources += [
-      "//third_party/skia/src/ports/SkOSFile_posix.cpp",
-      "//third_party/skia/src/ports/SkTLS_pthread.cpp",
-    ]
+    sources += [ "//third_party/skia/src/ports/SkOSFile_posix.cpp" ]
   }
 
   frameworks = []