remove use of deprecated env

Signed-off-by: Ian Chen <[email protected]>

src/RenderEngineManager.cc

@@ -95,10 +95,6 @@ class gz::rendering::RenderEngineManagerPrivate
   /// \brief Plugin loader for managing render engine plugin libraries.
   public: gz::plugin::Loader pluginLoader;
 
-  /// \brief Deprecated environment variable which holds paths to look for
-  /// plugins
-  public: std::string pluginPathEnvDeprecated = "IGN_RENDERING_PLUGIN_PATH";
-
   /// \brief Environment variable which holds paths to look for plugins
   public: std::string pluginPathEnv = "GZ_RENDERING_PLUGIN_PATH";
 
@@ -475,23 +471,9 @@ bool RenderEngineManagerPrivate::LoadEnginePlugin(
   auto pathToLib = systemPaths.FindSharedLibrary(_filename);
   if (pathToLib.empty())
   {
-    // Try deprecated environment variable
-    common::SystemPaths systemPathsDep;
-    systemPathsDep.SetPluginPathEnv(this->pluginPathEnvDeprecated);
-    pathToLib = systemPathsDep.FindSharedLibrary(_filename);
-    if (pathToLib.empty())
-    {
-      gzerr << "Failed to load plugin [" << _filename <<
-               "] : couldn't find shared library." << std::endl;
-      return false;
-    }
-    else
-    {
-      gzwarn << "Found plugin [" << _filename
-             << "] using deprecated environment variable ["
-             << this->pluginPathEnvDeprecated << "]. Please use ["
-             << this->pluginPathEnv << "] instead." << std::endl;
-    }
+    gzerr << "Failed to load plugin [" << _filename <<
+             "] : couldn't find shared library." << std::endl;
+    return false;
   }
 
   // Load plugin

src/base/BaseScene.cc

@@ -1655,20 +1655,6 @@ void BaseScene::CreateMaterials()
   material->SetLightingEnabled(true);
 
   const char *env = std::getenv("GZ_RENDERING_RESOURCE_PATH");
-
-  // TODO(CH3): Deprecated. Remove on tock.
-  if (!env)
-  {
-    env = std::getenv("IGN_RENDERING_RESOURCE_PATH");
-
-    if (env)
-    {
-      gzwarn << "Using deprecated environment variable "
-             << "[IGN_RENDERING_RESOURCE_PATH]. Please use "
-             << "[GZ_RENDERING_RESOURCE_PATH] instead." << std::endl;
-    }
-  }
-
   std::string resourcePath = (env) ? std::string(env) :
       gz::rendering::getResourcePath();