diff --git a/src/http2.cc b/src/http2.cc
index 6f347cc2..f563596e 100644
--- a/src/http2.cc
+++ b/src/http2.cc
@@ -768,51 +768,6 @@ void index_header(HeaderIndex &hdidx, int32_t token, size_t idx) {
   hdidx[token] = idx;
 }
 
-bool check_http2_request_pseudo_header(const HeaderIndex &hdidx,
-                                       int32_t token) {
-  switch (token) {
-  case HD__AUTHORITY:
-  case HD__METHOD:
-  case HD__PATH:
-  case HD__SCHEME:
-    return hdidx[token] == -1;
-  default:
-    return false;
-  }
-}
-
-bool check_http2_response_pseudo_header(const HeaderIndex &hdidx,
-                                        int32_t token) {
-  switch (token) {
-  case HD__STATUS:
-    return hdidx[token] == -1;
-  default:
-    return false;
-  }
-}
-
-bool http2_header_allowed(int32_t token) {
-  switch (token) {
-  case HD_CONNECTION:
-  case HD_KEEP_ALIVE:
-  case HD_PROXY_CONNECTION:
-  case HD_TRANSFER_ENCODING:
-  case HD_UPGRADE:
-    return false;
-  default:
-    return true;
-  }
-}
-
-bool http2_mandatory_request_headers_presence(const HeaderIndex &hdidx) {
-  if (hdidx[HD__METHOD] == -1 || hdidx[HD__PATH] == -1 ||
-      hdidx[HD__SCHEME] == -1 ||
-      (hdidx[HD__AUTHORITY] == -1 && hdidx[HD_HOST] == -1)) {
-    return false;
-  }
-  return true;
-}
-
 const Headers::value_type *get_header(const HeaderIndex &hdidx, int32_t token,
                                       const Headers &nva) {
   auto i = hdidx[token];
diff --git a/src/http2.h b/src/http2.h
index 58a4cc00..785089c6 100644
--- a/src/http2.h
+++ b/src/http2.h
@@ -279,23 +279,6 @@ void init_hdidx(HeaderIndex &hdidx);
 // Indexes header |token| using index |idx|.
 void index_header(HeaderIndex &hdidx, int32_t token, size_t idx);
 
-// Returns true if HTTP/2 request pseudo header |token| is not indexed
-// yet and not -1.
-bool check_http2_request_pseudo_header(const HeaderIndex &hdidx, int32_t token);
-
-// Returns true if HTTP/2 response pseudo header |token| is not
-// indexed yet and not -1.
-bool check_http2_response_pseudo_header(const HeaderIndex &hdidx,
-                                        int32_t token);
-
-// Returns true if header field denoted by |token| is allowed for
-// HTTP/2.
-bool http2_header_allowed(int32_t token);
-
-// Returns true that |hdidx| contains mandatory HTTP/2 request
-// headers.
-bool http2_mandatory_request_headers_presence(const HeaderIndex &hdidx);
-
 // Returns header denoted by |token| using index |hdidx|.
 const Headers::value_type *get_header(const HeaderIndex &hdidx, int32_t token,
                                       const Headers &nva);
diff --git a/src/http2_test.cc b/src/http2_test.cc
index 8f3aab35..34f96461 100644
--- a/src/http2_test.cc
+++ b/src/http2_test.cc
@@ -271,53 +271,6 @@ void test_http2_lookup_token(void) {
   CU_ASSERT(http2::HD_EXPECT == http2::lookup_token("expect"));
 }
 
-void test_http2_check_http2_pseudo_header(void) {
-  http2::HeaderIndex hdidx;
-  http2::init_hdidx(hdidx);
-
-  CU_ASSERT(http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
-  hdidx[http2::HD__PATH] = 0;
-  CU_ASSERT(http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
-  hdidx[http2::HD__METHOD] = 1;
-  CU_ASSERT(
-      !http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
-  CU_ASSERT(!http2::check_http2_request_pseudo_header(hdidx, http2::HD_VIA));
-
-  http2::init_hdidx(hdidx);
-
-  CU_ASSERT(
-      http2::check_http2_response_pseudo_header(hdidx, http2::HD__STATUS));
-  hdidx[http2::HD__STATUS] = 0;
-  CU_ASSERT(
-      !http2::check_http2_response_pseudo_header(hdidx, http2::HD__STATUS));
-  CU_ASSERT(!http2::check_http2_response_pseudo_header(hdidx, http2::HD_VIA));
-}
-
-void test_http2_http2_header_allowed(void) {
-  CU_ASSERT(http2::http2_header_allowed(http2::HD__PATH));
-  CU_ASSERT(http2::http2_header_allowed(http2::HD_CONTENT_LENGTH));
-  CU_ASSERT(!http2::http2_header_allowed(http2::HD_CONNECTION));
-}
-
-void test_http2_mandatory_request_headers_presence(void) {
-  http2::HeaderIndex hdidx;
-  http2::init_hdidx(hdidx);
-
-  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
-  hdidx[http2::HD__AUTHORITY] = 0;
-  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
-  hdidx[http2::HD__METHOD] = 1;
-  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
-  hdidx[http2::HD__PATH] = 2;
-  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
-  hdidx[http2::HD__SCHEME] = 3;
-  CU_ASSERT(http2::http2_mandatory_request_headers_presence(hdidx));
-
-  hdidx[http2::HD__AUTHORITY] = -1;
-  hdidx[http2::HD_HOST] = 0;
-  CU_ASSERT(http2::http2_mandatory_request_headers_presence(hdidx));
-}
-
 void test_http2_parse_link_header(void) {
   {
     // only URI appears; we don't extract URI unless it bears rel=preload
diff --git a/src/http2_test.h b/src/http2_test.h
index 80f14cd8..029e8e6f 100644
--- a/src/http2_test.h
+++ b/src/http2_test.h
@@ -40,9 +40,6 @@ void test_http2_rewrite_location_uri(void);
 void test_http2_parse_http_status_code(void);
 void test_http2_index_header(void);
 void test_http2_lookup_token(void);
-void test_http2_check_http2_pseudo_header(void);
-void test_http2_http2_header_allowed(void);
-void test_http2_mandatory_request_headers_presence(void);
 void test_http2_parse_link_header(void);
 void test_http2_path_join(void);
 void test_http2_normalize_path(void);
diff --git a/src/shrpx-unittest.cc b/src/shrpx-unittest.cc
index 0e7b17a1..8eba2c65 100644
--- a/src/shrpx-unittest.cc
+++ b/src/shrpx-unittest.cc
@@ -89,12 +89,6 @@ int main(int argc, char *argv[]) {
                    shrpx::test_http2_index_header) ||
       !CU_add_test(pSuite, "http2_lookup_token",
                    shrpx::test_http2_lookup_token) ||
-      !CU_add_test(pSuite, "http2_check_http2_pseudo_header",
-                   shrpx::test_http2_check_http2_pseudo_header) ||
-      !CU_add_test(pSuite, "http2_http2_header_allowed",
-                   shrpx::test_http2_http2_header_allowed) ||
-      !CU_add_test(pSuite, "http2_mandatory_request_headers_presence",
-                   shrpx::test_http2_mandatory_request_headers_presence) ||
       !CU_add_test(pSuite, "http2_parse_link_header",
                    shrpx::test_http2_parse_link_header) ||
       !CU_add_test(pSuite, "http2_path_join", shrpx::test_http2_path_join) ||