Remove JSMessage::kRunSuccess and its string

It is unused. Apparently, success is not possible ...

Change-Id: If8fd079484af5f7c232a4dceedb4dc9a7b14a230
Reviewed-on: https://pdfium-review.googlesource.com/c/44532
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

fxjs/js_resources.cpp

diff --git a/fxjs/js_resources.cpp b/fxjs/js_resources.cpp
index 5df1460..29edf89 100644
--- a/fxjs/js_resources.cpp
+++ b/fxjs/js_resources.cpp
@@ -31,8 +31,6 @@
       return L"System is busy.";
     case JSMessage::kDuplicateEventError:
       return L"Duplicate formfield event found.";
-    case JSMessage::kRunSuccess:
-      return L"Script ran successfully.";
     case JSMessage::kSecondParamNotDateError:
       return L"The second parameter can't be converted to a Date.";
     case JSMessage::kSecondParamInvalidDateError:

fxjs/js_resources.h

diff --git a/fxjs/js_resources.h b/fxjs/js_resources.h
index 10bbcb8..064fd16 100644
--- a/fxjs/js_resources.h
+++ b/fxjs/js_resources.h
@@ -10,8 +10,7 @@
 #include "core/fxcrt/widestring.h"
 
 enum class JSMessage {
-  kRunSuccess = 0,
-  kAlert,
+  kAlert = 1,
   kParamError,
   kInvalidInputError,
   kParamTooLongError,