Remove SignatureAlgorithm::Equals() and associated functions.

net/cert/internal/signature_algorithm.h

Index: net/cert/internal/signature_algorithm.h
diff --git a/net/cert/internal/signature_algorithm.h b/net/cert/internal/signature_algorithm.h
index 9ecf252d6712032d672b794c9777f34d0c56e9e6..5d8141ad3f200d83f44d792c3e38d7e19e2c307d 100644
--- a/net/cert/internal/signature_algorithm.h
+++ b/net/cert/internal/signature_algorithm.h
@@ -53,8 +53,6 @@ class NET_EXPORT RsaPssParameters : public SignatureAlgorithmParameters {
  public:
   RsaPssParameters(DigestAlgorithm mgf1_hash, uint32_t salt_length);
 
-  bool Equals(const RsaPssParameters* other) const;
-
   DigestAlgorithm mgf1_hash() const { return mgf1_hash_; }
   uint32_t salt_length() const { return salt_length_; }
 
@@ -84,10 +82,6 @@ class NET_EXPORT SignatureAlgorithm {
                                                      DigestAlgorithm mgf1_hash,
                                                      uint32_t salt_length);
 
-  // Returns true if |*this| is equivalent to |other|. This compares both the
-  // algorithm ID and each parameter for equality.
-  bool Equals(const SignatureAlgorithm& other) const WARN_UNUSED_RESULT;
-
   // The following methods retrieve the parameters for the signature algorithm.
   //
   // The correct parameters should be chosen based on the algorithm ID. For