src: Remove lookup_method_token(const std::string&)

src/http2.cc

@@ -1205,11 +1205,6 @@ bool expect_response_body(int method_token, int status_code) {
   return method_token != HTTP_HEAD && expect_response_body(status_code);
 }
 
-int lookup_method_token(const std::string &name) {
-  return lookup_method_token(reinterpret_cast<const uint8_t *>(name.c_str()),
-                             name.size());
-}
-
 int lookup_method_token(const StringRef &name) {
   return lookup_method_token(name.byte(), name.size());
 }

src/http2.h

@@ -352,7 +352,6 @@ bool expect_response_body(int status_code);
 // Only methods defined in http-parser/http-parser.h (http_method) are
 // tokenized.  If method name cannot be tokenized, returns -1.
 int lookup_method_token(const uint8_t *name, size_t namelen);
-int lookup_method_token(const std::string &name);
 int lookup_method_token(const StringRef &name);
 
 // Returns string  representation of |method_token|.  This  is wrapper