remove the memleak tests (#10322)

they are fragile, haven't caught regressions, and increasingly pointless
as we oxidize.

src/_cffi_src/openssl/crypto.py

@@ -9,8 +9,6 @@
 """
 
 TYPES = """
-static const long Cryptography_HAS_MEM_FUNCTIONS;
-
 static const int OPENSSL_VERSION;
 static const int OPENSSL_CFLAGS;
 static const int OPENSSL_BUILT_ON;
@@ -26,50 +24,7 @@
 
 void *OPENSSL_malloc(size_t);
 void OPENSSL_free(void *);
-
-
-/* Signature is significantly different in LibreSSL, so expose via different
-   symbol name */
-int Cryptography_CRYPTO_set_mem_functions(
-    void *(*)(size_t, const char *, int),
-    void *(*)(void *, size_t, const char *, int),
-    void (*)(void *, const char *, int));
-
-void *Cryptography_malloc_wrapper(size_t, const char *, int);
-void *Cryptography_realloc_wrapper(void *, size_t, const char *, int);
-void Cryptography_free_wrapper(void *, const char *, int);
 """
 
 CUSTOMIZATIONS = """
-#if CRYPTOGRAPHY_IS_LIBRESSL || CRYPTOGRAPHY_IS_BORINGSSL
-static const long Cryptography_HAS_MEM_FUNCTIONS = 0;
-int (*Cryptography_CRYPTO_set_mem_functions)(
-    void *(*)(size_t, const char *, int),
-    void *(*)(void *, size_t, const char *, int),
-    void (*)(void *, const char *, int)) = NULL;
-
-#else
-static const long Cryptography_HAS_MEM_FUNCTIONS = 1;
-
-int Cryptography_CRYPTO_set_mem_functions(
-    void *(*m)(size_t, const char *, int),
-    void *(*r)(void *, size_t, const char *, int),
-    void (*f)(void *, const char *, int)
-) {
-    return CRYPTO_set_mem_functions(m, r, f);
-}
-#endif
-
-void *Cryptography_malloc_wrapper(size_t size, const char *path, int line) {
-    return malloc(size);
-}
-
-void *Cryptography_realloc_wrapper(void *ptr, size_t size, const char *path,
-                                   int line) {
-    return realloc(ptr, size);
-}
-
-void Cryptography_free_wrapper(void *ptr, const char *path, int line) {
-    free(ptr);
-}
 """

src/cryptography/hazmat/bindings/openssl/_conditional.py

@@ -28,12 +28,6 @@ def cryptography_has_tls_st() -> list[str]:
     ]
 
 
-def cryptography_has_mem_functions() -> list[str]:
-    return [
-        "Cryptography_CRYPTO_set_mem_functions",
-    ]
-
-
 def cryptography_has_ed448() -> list[str]:
     return [
         "EVP_PKEY_ED448",
@@ -202,7 +196,6 @@ def cryptography_has_get_extms_support() -> list[str]:
     "Cryptography_HAS_SET_CERT_CB": cryptography_has_set_cert_cb,
     "Cryptography_HAS_SSL_ST": cryptography_has_ssl_st,
     "Cryptography_HAS_TLS_ST": cryptography_has_tls_st,
-    "Cryptography_HAS_MEM_FUNCTIONS": cryptography_has_mem_functions,
     "Cryptography_HAS_ED448": cryptography_has_ed448,
     "Cryptography_HAS_SIGALGS": cryptography_has_ssl_sigalgs,
     "Cryptography_HAS_PSK": cryptography_has_psk,