Revert "Warning Dialog for ROS 1 EOL (#1843)"

This reverts commit 8fe12bb.
This made sense for the last Noetic release, but there is nothing wrong with ROS-O releases.

Author: v4hn

src/rviz/CMakeLists.txt

@@ -45,7 +45,6 @@ add_library(${PROJECT_NAME}
   message_filter_display.h
   mesh_loader.cpp
   new_object_dialog.cpp
-  noetic_eol_dialog.cpp
   add_display_dialog.cpp
   ogre_helpers/apply_visibility_bits.cpp
   ogre_helpers/arrow.cpp

src/rviz/noetic_eol_dialog.cpp

@@ -28,7 +28,6 @@
  */
 
 #include <QApplication>
-#include <QProcessEnvironment> // check env variables
 #include <QTimer>
 
 #include <boost/program_options.hpp>
@@ -55,7 +54,6 @@
 #include <rviz/visualization_frame.h>
 #include <rviz/visualization_manager.h>
 #include <rviz/wait_for_master_dialog.h>
-#include <rviz/noetic_eol_dialog.h>
 #include <rviz/ogre_helpers/render_system.h>
 
 #include <rviz/visualizer_app.h>
@@ -233,17 +231,6 @@ bool VisualizerApp::init(int argc, char** argv)
     save_config_service_ =
         private_nh.advertiseService("save_config", &VisualizerApp::saveConfigCallback, this);
 
-      // Notify users of ROS 1 EOL Date
-      // Get the environment variables
-      QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
-      // If environment variable is not set
-      if(!env.contains("DISABLE_ROS1_EOL_WARNINGS"))
-      {
-        // Create a warning pop up
-        NoeticEOLDialog eol_dialog;
-        eol_dialog.exec();
-      }
-
 #if CATCH_EXCEPTIONS
   }
   catch (std::exception& e)