CSPDirectiveList.cpp: Remove dead code.

third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp

Index: third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
diff --git a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
index 053ddde6ecc087cc6d5cbaf463a287a75f520479..392d868b4d455a6b77ad651b3fb6fe18049306a6 100644
--- a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
+++ b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
@@ -40,11 +40,6 @@ String GetSha256String(const String& content) {
                                   digest.size(), kBase64DoNotInsertLFs);
 }
 
-template <typename CharType>
-inline bool IsASCIIAlphanumericOrHyphen(CharType c) {
-  return IsASCIIAlphanumeric(c) || c == '-';
-}
-
 ContentSecurityPolicyHashAlgorithm ConvertHashAlgorithmToCSPHashAlgorithm(
     HashAlgorithm algorithm) {
   switch (algorithm) {