8318340: Improve RSA key implementations

Reviewed-by: rhalade, mschoene, valeriep, mullan

src/java.base/share/classes/sun/security/rsa/RSAPrivateCrtKeyImpl.java

@@ -301,14 +301,6 @@ public final class RSAPrivateCrtKeyImpl
         return keyParams;
     }
 
-    // return a string representation of this key for debugging
-    @Override
-    public String toString() {
-        return "SunRsaSign " + type.keyAlgo + " private CRT key, "
-               + n.bitLength() + " bits" + "\n  params: " + keyParams
-               + "\n  modulus: " + n + "\n  private exponent: " + d;
-    }
-
     // utility method for parsing DER encoding of RSA private keys in PKCS#1
     // format as defined in RFC 8017 Appendix A.1.2, i.e. SEQ of version, n,
     // e, d, p, q, pe, qe, and coeff, and return the parsed components.

src/java.base/share/classes/sun/security/rsa/RSAPrivateKeyImpl.java

@@ -138,14 +138,6 @@ public final class RSAPrivateKeyImpl extends PKCS8Key implements RSAPrivateKey {
         return keyParams;
     }
 
-    // return a string representation of this key for debugging
-    @Override
-    public String toString() {
-        return "Sun " + type.keyAlgo + " private key, " + n.bitLength()
-               + " bits" + "\n  params: " + keyParams + "\n  modulus: " + n
-               + "\n  private exponent: " + d;
-    }
-
     /**
      * Restores the state of this object from the stream.
      * <p>