Remove old vestiages of Windows Breeze icons support

This was before the new KIconThemes functions were a thing, so these
can probably be safely removed.

CMakeLists.txt

@@ -73,11 +73,6 @@ endif ()
 
 find_package(Qt6Keychain REQUIRED)
 
-# TODO: we should really do this on all platforms anyway
-if (WIN32)
-    find_package(KF6BreezeIcons REQUIRED)
-endif ()
-
 add_subdirectory(external)
 add_subdirectory(launcher)
 

launcher/CMakeLists.txt

@@ -193,12 +193,6 @@ if (BUILD_WEBVIEW)
     target_compile_definitions(astra PRIVATE HAVE_WEBVIEW)
 endif ()
 
-if (WIN32)
-    target_link_libraries(astra PRIVATE
-            KF6::BreezeIcons
-    )
-endif ()
-
 if (WIN32)
     set_target_properties(astra PROPERTIES
             WIN32_EXECUTABLE TRUE

launcher/src/main.cpp

@@ -20,11 +20,6 @@
 #include "physis_logger.h"
 #include "utility.h"
 
-#ifdef Q_OS_WIN
-#include <BreezeIcons/BreezeIcons>
-#include <QIcon>
-#endif
-
 using namespace Qt::StringLiterals;
 
 int main(int argc, char *argv[])