[dotnet] remove deprecated locator functionality

Author: titusfortner

dotnet/src/webdriver/Internal/IFindsByClassName.cs

@@ -65,22 +65,6 @@ private RelativeBy(object root, List<object> filters) : this()
             }
         }
 
-        /// <summary>
-        /// Creates a new <see cref="RelativeBy"/> for finding elements with the specified tag name.
-        /// </summary>
-        /// <param name="tagName">The tag name of the element to find.</param>
-        /// <returns>A <see cref="RelativeBy"/> object to be used in finding the elements.</returns>
-        [Obsolete("Use the WithLocator method instead, passing By.TagName.")]
-        public static RelativeBy WithTagName(string tagName)
-        {
-            if (string.IsNullOrEmpty(tagName))
-            {
-                throw new ArgumentException("Tag name must not be null or the empty string", nameof(tagName));
-            }
-
-            return new RelativeBy(By.TagName(tagName));
-        }
-
         /// <summary>
         /// Creates a new <see cref="RelativeBy"/> for finding elements with the specified tag name.
         /// </summary>

dotnet/src/webdriver/Internal/IFindsByCssSelector.cs

@@ -58,7 +58,7 @@ namespace OpenQA.Selenium.Remote
     /// }
     /// </code>
     /// </example>
-    public class RemoteWebDriver : WebDriver, IDevTools, IFindsById, IFindsByClassName, IFindsByLinkText, IFindsByName, IFindsByTagName, IFindsByXPath, IFindsByPartialLinkText, IFindsByCssSelector
+    public class RemoteWebDriver : WebDriver, IDevTools
     {
         public readonly string RemoteDevToolsEndPointCapabilityName = "se:cdp";
         public readonly string RemoteDevToolsVersionCapabilityName = "se:cdpVersion";