flake8: fix unnecessary f-strings without any format placeholders

These can just be ordinary strings.

mesonbuild/interpreter/interpreter.py

@@ -2333,7 +2333,7 @@ class Interpreter(InterpreterBase, HoldableObject):
     def _warn_kwarg_install_mode_sticky(self, mode: FileMode) -> None:
         if mode.perms > 0 and mode.perms & stat.S_ISVTX:
             mlog.deprecation('install_mode with the sticky bit on a file does not do anything and will '
-                             f'be ignored since Meson 0.64.0', location=self.current_node)
+                             'be ignored since Meson 0.64.0', location=self.current_node)
             perms = stat.filemode(mode.perms - stat.S_ISVTX)[1:]
             return FileMode(perms, mode.owner, mode.group)
         else:

mesonbuild/wrap/wrap.py

@@ -558,8 +558,8 @@ class Resolver:
                 elif url.scheme == 'ftp':
                     urlstring = urllib.parse.urlunparse(url._replace(netloc=f'{login}:{password}@{url.netloc}'))
                 else:
-                    mlog.warning(f'Meson is not going to use netrc credentials for protocols other than https/ftp',
+                    mlog.warning('Meson is not going to use netrc credentials for protocols other than https/ftp',
-                                  fatal=False)
+                                 fatal=False)
 
             try:
                 req = urllib.request.Request(urlstring, headers=headers)