diff --git a/src/native/libs/System.Security.Cryptography.Native/configure.cmake b/src/native/libs/System.Security.Cryptography.Native/configure.cmake
index 78caad3fd5bd25..89d4c6c4760a0a 100644
--- a/src/native/libs/System.Security.Cryptography.Native/configure.cmake
+++ b/src/native/libs/System.Security.Cryptography.Native/configure.cmake
@@ -35,11 +35,6 @@ check_source_compiles(C "
 int main(void) { ENGINE_init(NULL); return 1; }"
 HAVE_OPENSSL_ENGINE)
 
-check_source_compiles(C "
-#include <openssl/rsa.h>
-int main(void) { RSA *r = RSA_new(); RSA_free(r); return 0; }"
-HAVE_OPENSSL_RSA_PRIMITIVE)
-
 configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/pal_crypto_config.h.in
     ${CMAKE_CURRENT_BINARY_DIR}/pal_crypto_config.h)
diff --git a/src/native/libs/System.Security.Cryptography.Native/opensslshim.h b/src/native/libs/System.Security.Cryptography.Native/opensslshim.h
index 22425beb8a4126..156f4470ae3d5c 100644
--- a/src/native/libs/System.Security.Cryptography.Native/opensslshim.h
+++ b/src/native/libs/System.Security.Cryptography.Native/opensslshim.h
@@ -209,26 +209,6 @@ int SSL_set_ciphersuites(SSL *s, const char *str);
 const SSL_CIPHER* SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr);
 #endif
 
-#if !HAVE_OPENSSL_RSA_PRIMITIVE
-// In portable build, we need to support legacy RSA functions even if they were not present
-// on the build OS. The shim will detect their presence at runtime.
-#undef HAVE_OPENSSL_RSA_PRIMITIVE
-#define HAVE_OPENSSL_RSA_PRIMITIVE 1
-
-typedef struct rsa_st RSA;
-typedef struct rsa_meth_st RSA_METHOD;
-
-const RSA* EVP_PKEY_get0_RSA(const EVP_PKEY* pkey);
-int EVP_PKEY_set1_RSA(EVP_PKEY* pkey, RSA* key);
-const RSA_METHOD* RSA_get_method(const RSA* rsa);
-int RSA_get_multi_prime_extra_count(const RSA* rsa);
-void RSA_get0_key(const RSA* r, const BIGNUM** n, const BIGNUM** e, const BIGNUM** d);
-void RSA_get0_factors(const RSA* r, const BIGNUM** p, const BIGNUM** q);
-void RSA_get0_crt_params(const RSA* r, const BIGNUM** dmp1, const BIGNUM** dmq1, const BIGNUM** iqmp);
-int RSA_meth_get_flags(const RSA_METHOD* meth);
-int RSA_test_flags(const RSA* r, int flags);
-#endif
-
 #if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_4_0_RTM
 #include "osslcompat_40.h"
 #endif
diff --git a/src/native/libs/System.Security.Cryptography.Native/pal_crypto_config.h.in b/src/native/libs/System.Security.Cryptography.Native/pal_crypto_config.h.in
index 2e54fbf405321d..d09ed47fa02843 100644
--- a/src/native/libs/System.Security.Cryptography.Native/pal_crypto_config.h.in
+++ b/src/native/libs/System.Security.Cryptography.Native/pal_crypto_config.h.in
@@ -6,4 +6,3 @@
 #cmakedefine01 HAVE_OPENSSL_SHA3_SQUEEZE
 #cmakedefine01 HAVE_OPENSSL_EVP_PKEY_SIGN_MESSAGE_INIT
 #cmakedefine01 HAVE_OPENSSL_ENGINE
-#cmakedefine01 HAVE_OPENSSL_RSA_PRIMITIVE