Misc: Remove backported license text

For anyone trying to start drama, I have copyright over this code and
never signed a CLA, therefore can relicense it how I see fit (in this
case is no license, i.e. no rights, although the entire DuckStation as
is currently distributed is GPLv3).

src/common/file_system.cpp

@@ -1,18 +1,3 @@
-/*  PCSX2 - PS2 Emulator for PCs
- *  Copyright (C) 2002-2021  PCSX2 Dev Team
- *
- *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
- *  of the GNU Lesser General Public License as published by the Free Software Found-
- *  ation, either version 3 of the License, or (at your option) any later version.
- *
- *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *  PURPOSE.  See the GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along with PCSX2.
- *  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #include "file_system.h"
 #include "assert.h"
 #include "log.h"

src/frontend-common/imgui_fullscreen.h

@@ -1,18 +1,3 @@
-/*  PCSX2 - PS2 Emulator for PCs
- *  Copyright (C) 2002-2022  PCSX2 Dev Team
- *
- *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
- *  of the GNU Lesser General Public License as published by the Free Software Found-
- *  ation, either version 3 of the License, or (at your option) any later version.
- *
- *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *  PURPOSE.  See the GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along with PCSX2.
- *  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #pragma once
 #include "common/types.h"
 #include "imgui.h"

src/frontend-common/imgui_manager.h

@@ -1,18 +1,3 @@
-/*  PCSX2 - PS2 Emulator for PCs
- *  Copyright (C) 2002-2021  PCSX2 Dev Team
- *
- *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
- *  of the GNU Lesser General Public License as published by the Free Software Found-
- *  ation, either version 3 of the License, or (at your option) any later version.
- *
- *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *  PURPOSE.  See the GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along with PCSX2.
- *  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #pragma once
 
 #include "common/types.h"

src/util/ini_settings_interface.cpp

@@ -1,18 +1,3 @@
-/*  PCSX2 - PS2 Emulator for PCs
- *  Copyright (C) 2002-2021  PCSX2 Dev Team
- *
- *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
- *  of the GNU Lesser General Public License as published by the Free Software Found-
- *  ation, either version 3 of the License, or (at your option) any later version.
- *
- *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *  PURPOSE.  See the GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along with PCSX2.
- *  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #include "ini_settings_interface.h"
 #include "common/file_system.h"
 #include "common/log.h"

src/util/ini_settings_interface.h

@@ -1,18 +1,3 @@
-/*  PCSX2 - PS2 Emulator for PCs
- *  Copyright (C) 2002-2021  PCSX2 Dev Team
- *
- *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
- *  of the GNU Lesser General Public License as published by the Free Software Found-
- *  ation, either version 3 of the License, or (at your option) any later version.
- *
- *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *  PURPOSE.  See the GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along with PCSX2.
- *  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #pragma once
 #include "common/settings_interface.h"