[dotnet] The prebuild scripts is already decommissioned (#14591)

* [dotnet] The prebuild scripts is already decommissioned

* And don't specify exact cdp version in csproj

Author: nvborisenko

dotnet/src/webdriver/WebDriver.csproj

@@ -106,7 +106,7 @@
   </Target>
 
   <Target Name="GenerateCdp" BeforeTargets="CoreCompile">
-    <Exec Command="bazel build //dotnet/src/webdriver/cdp:generate-v85 //dotnet/src/webdriver/cdp:generate-v127 //dotnet/src/webdriver/cdp:generate-v128 //dotnet/src/webdriver/cdp:generate-v129" WorkingDirectory="../../.." />
+    <Exec Command="bazel build //dotnet/src/webdriver/cdp/..." WorkingDirectory="../../.." />
 
     <ItemGroup>
       <Compile Include="..\..\..\bazel-bin\dotnet\src\webdriver\cdp\**\*.cs" LinkBase="DevTools\generated" />

dotnet/src/webdriver/cdp/README.md

@@ -52,9 +52,4 @@ perform the following steps, where `<N>` is the major version of the protocol:
 remove the entry for version `<N>` from the `SupportedDevToolsVersions` dictionary initialization.
 3. Remove the version string (`v<N>`) from the `SUPPORTED_DEVTOOLS_VERSIONS` list in
 [`//dotnet:selenium-dotnet-version.bzl`](https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/selenium-dotnet-version.bzl).
-4. In [`//dotnet/src/webdriver:WebDriver.csproj.prebuild.cmd`](https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/WebDriver.csproj.prebuild.cmd),
-remove the `if not exist` block for version `<N>`.
-5. In [`//dotnet/src/webdriver:WebDriver.csproj.prebuild.sh`](https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/WebDriver.csproj.prebuild.sh),
-remove the `if-fi` block for version `<N>`.
-6. Commit the changes.
-
+4. Commit the changes.