treewide: remove unnessary "coding" header

The "-*- coding: utf-8 -*-" header was needed in Python 2,
but in Python 3 UTF-8 is already the default encoding of
source files.

It is even less necessary in .css files that do not have UTF-8
sequences at all.

Suggested-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20250929154938.594389-4-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

scripts/qapi/error.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # Copyright (c) 2017-2019 Red Hat Inc.
 #
 # Authors:

scripts/qapi/expr.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # Copyright IBM, Corp. 2011
 # Copyright (c) 2013-2021 Red Hat Inc.
 #

scripts/qapi/gen.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # QAPI code generation
 #
 # Copyright (c) 2015-2019 Red Hat Inc.

scripts/qapi/parser.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # QAPI schema parser
 #
 # Copyright IBM, Corp. 2011

scripts/qapi/schema.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # QAPI schema internal representation
 #
 # Copyright (c) 2015-2019 Red Hat Inc.