Remove the Widevine signature files from the Linux and ChromeOS builds

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index 900ec35c04fb32aaa87c68148e8dad617dd671df..32b0fd62ff89bffd9d867e878a2956b53f5f9c11 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -273,12 +273,8 @@ if (!is_android && !is_mac) {
     # Only ChromeOS has precompiled Flash that needs to get copied to the output
     # directory. On other platforms, Flash is either component-updated only or
     # not supported at all.
-    # As well, the scripts to sign files for Widevine need to be copied to the
-    # output directory so that the scripts can be run on the executables after
-    # stripping.
     if (is_chromeos) {
       deps += [ "//third_party/adobe/flash:flapper_binaries" ]
-      data_deps += [ "//third_party/widevine/cdm:widevine_signature_scripts" ]
     }
 
     data_deps += [ "//third_party/widevine/cdm:widevinecdmadapter" ]