Removed the client side validation

Author: pmathew92

auth0/src/main/java/com/auth0/android/authentication/AuthenticationAPIClient.kt

@@ -24,7 +24,6 @@ import com.auth0.android.request.internal.GsonAdapter.Companion.forMapOf
 import com.auth0.android.request.internal.GsonProvider
 import com.auth0.android.request.internal.RequestFactory
 import com.auth0.android.request.internal.ResponseUtils.isNetworkError
-import com.auth0.android.request.internal.validator.CustomTokenExchangeValidator
 import com.auth0.android.result.Challenge
 import com.auth0.android.result.Credentials
 import com.auth0.android.result.DatabaseUser
@@ -770,7 +769,6 @@ public class AuthenticationAPIClient @VisibleForTesting(otherwise = VisibleForTe
         organization: String? = null
     ): AuthenticationRequest {
         return tokenExchange(subjectTokenType, subjectToken, organization)
-            .addValidator(CustomTokenExchangeValidator())
     }
 
     /**

auth0/src/main/java/com/auth0/android/request/internal/validator/CustomTokenExchangeValidator.kt

@@ -2378,92 +2378,6 @@ public class AuthenticationAPIClientTest {
         assertThat(credentials, Matchers.`is`(Matchers.notNullValue()))
     }
 
-    @Test
-    public fun shouldFailCustomTokenExchangeWithReservedNamespace() {
-        val callback = MockAuthenticationCallback<Credentials>()
-        client.customTokenExchange("https://auth0.com", "subject-token")
-            .start(callback)
-        ShadowLooper.idleMainLooper()
-
-        assertThat(
-            callback.error.message,
-            Matchers.containsString("Invalid URI")
-        )
-        assertThat(callback.error.cause, Matchers.instanceOf(IllegalArgumentException::class.java))
-        assertThat(
-            callback.error.cause?.message,
-            Matchers.containsString("reserved namespace")
-        )
-    }
-
-    @Test
-    public fun shouldFailCustomTokenExchangeSyncWithReservedNamespace() {
-        val exception = assertThrows(AuthenticationException::class.java) {
-            client.customTokenExchange("urn:okta", "subject-token")
-                .execute()
-        }
-
-        assertThat(exception.message, Matchers.containsString("Invalid URI"))
-        assertThat(exception.cause, Matchers.instanceOf(IllegalArgumentException::class.java))
-        assertThat(
-            exception.cause?.message,
-            Matchers.containsString("reserved namespace")
-        )
-    }
-
-    @Test
-    @ExperimentalCoroutinesApi
-    public fun shouldFailCustomTokenExchangeAwaitWithReservedNamespace() {
-        val exception = assertThrows(AuthenticationException::class.java) {
-            runTest {
-                client.customTokenExchange("urn:auth0", "subject-token")
-                    .await()
-            }
-        }
-
-        assertThat(exception.message, Matchers.containsString("Invalid URI"))
-        assertThat(exception.cause, Matchers.instanceOf(IllegalArgumentException::class.java))
-        assertThat(
-            exception.cause?.message,
-            Matchers.containsString("reserved namespace")
-        )
-    }
-
-    @Test
-    public fun shouldFailCustomTokenExchangeWithInvalidHttpUri() {
-        val callback = MockAuthenticationCallback<Credentials>()
-        client.customTokenExchange("http://invalid uri with spaces", "subject-token")
-            .start(callback)
-        ShadowLooper.idleMainLooper()
-
-        assertThat(callback, AuthenticationCallbackMatcher.hasError(Credentials::class.java))
-        assertThat(
-            callback.error.message,
-            Matchers.containsString("Invalid URI")
-        )
-        assertThat(
-            callback.error.cause?.message,
-            Matchers.containsString("not a valid URI")
-        )
-    }
-
-    @Test
-    public fun shouldFailCustomTokenExchangeWithMalformedHttpsUri() {
-        val callback = MockAuthenticationCallback<Credentials>()
-        client.customTokenExchange("https://[invalid:uri:format", "subject-token")
-            .start(callback)
-        ShadowLooper.idleMainLooper()
-
-        assertThat(
-            callback.error.message,
-            Matchers.containsString("Invalid URI")
-        )
-        assertThat(
-            callback.error.cause?.message,
-            Matchers.containsString("not a valid URI")
-        )
-    }
-
     @Test
     public fun shouldSsoExchange() {
         mockAPI.willReturnSuccessfulLogin()