crypto: rsa: Remove unused NEEDS_MANUAL_RELOC code bits

The last user of the NEEDS_MANUAL_RELOC has been removed in commit
26af162ac8f8 ("arch: m68k: Implement relocation")
Remove now unused NEEDS_MANUAL_RELOC code.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c b/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c
index 6a4d235..057cc74 100644
--- a/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c
+++ b/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c
@@ -16,24 +16,11 @@
 #include <asm/io.h>
 #include <linux/list.h>
 
-#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
-DECLARE_GLOBAL_DATA_PTR;
-#endif
-
 int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
 		struct key_prop *node, uint8_t *out)
 {
 	struct mod_exp_ops *ops = (struct mod_exp_ops *)device_get_ops(dev);
 
-#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
-	static bool done;
-
-	if (!done) {
-		done = true;
-		ops->mod_exp += gd->reloc_off;
-	}
-#endif
-
 	if (!ops->mod_exp)
 		return -ENOSYS;