Remove Linux shell window_configuration.cc (#59802)

Remove Linux shell window_configuration.cc/.h

It was a temporary solution while the shell was changing.

packages/flutter_tools/templates/app/linux.tmpl/CMakeLists.txt.tmpl

@@ -36,7 +36,6 @@ pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
 add_executable(${BINARY_NAME}
   "main.cc"
   "my_application.cc"
-  "window_configuration.cc"
   "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
 )
 apply_standard_settings(${BINARY_NAME})

packages/flutter_tools/templates/app/linux.tmpl/my_application.cc → packages/flutter_tools/templates/app/linux.tmpl/my_application.cc.tmpl

@@ -3,7 +3,6 @@
 #include <flutter_linux/flutter_linux.h>
 
 #include "flutter/generated_plugin_registrant.h"
-#include "window_configuration.h"
 
 struct _MyApplication {
   GtkApplication parent_instance;
@@ -17,11 +16,10 @@ static void my_application_activate(GApplication* application) {
       GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
   GtkHeaderBar *header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
   gtk_widget_show(GTK_WIDGET(header_bar));
-  gtk_header_bar_set_title(header_bar, kFlutterWindowTitle);
+  gtk_header_bar_set_title(header_bar, "{{projectName}}");
   gtk_header_bar_set_show_close_button(header_bar, TRUE);
   gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
-  gtk_window_set_default_size(window, kFlutterWindowWidth,
-                              kFlutterWindowHeight);
+  gtk_window_set_default_size(window, 1280, 720);
   gtk_widget_show(GTK_WIDGET(window));
 
   g_autoptr(FlDartProject) project = fl_dart_project_new();

packages/flutter_tools/templates/app/linux.tmpl/window_configuration.cc.tmpl

-#include "window_configuration.h"
-
-const char *kFlutterWindowTitle = "{{projectName}}";
-const unsigned int kFlutterWindowWidth = 1280;
-const unsigned int kFlutterWindowHeight = 720;

packages/flutter_tools/templates/app/linux.tmpl/window_configuration.h

-#ifndef WINDOW_CONFIGURATION_
-#define WINDOW_CONFIGURATION_
-
-// This is a temporary approach to isolate common customizations from main.cc,
-// where the APIs are still in flux. This should simplify re-creating the
-// runner while preserving local changes.
-//
-// Longer term there should be simpler configuration options for common
-// customizations like this, without requiring native code changes.
-
-extern const char *kFlutterWindowTitle;
-extern const unsigned int kFlutterWindowWidth;
-extern const unsigned int kFlutterWindowHeight;
-
-#endif  // WINDOW_CONFIGURATION_