Revert of Check that usage isn't empty when generateKey() is called

content/child/webcrypto/openssl/sym_key_openssl.cc

Index: content/child/webcrypto/openssl/sym_key_openssl.cc
diff --git a/content/child/webcrypto/openssl/sym_key_openssl.cc b/content/child/webcrypto/openssl/sym_key_openssl.cc
index 01793b69742c7e8922d963dc794c0480d4e9615f..39238335a26677fa9e3cb96d1872f80508131d62 100644
--- a/content/child/webcrypto/openssl/sym_key_openssl.cc
+++ b/content/child/webcrypto/openssl/sym_key_openssl.cc
@@ -24,9 +24,6 @@
                                 unsigned keylen_bytes,
                                 GenerateKeyResult* result) {
   crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-
-  if (usages == 0)
-    return Status::ErrorCreateKeyEmptyUsages();
 
   std::vector<unsigned char> random_bytes(keylen_bytes, 0);