cmake: Remove FindFontconfig.cmake

It's in extra-cmake-modules now.

cmake/modules/FindFontconfig.cmake

-#.rst:
-# FindFontconfig
-# --------------
-#
-# Try to find Fontconfig.
-# Once done this will define the following variables:
-#
-# ``Fontconfig_FOUND``
-#     True if Fontconfig is available
-# ``Fontconfig_INCLUDE_DIRS``
-#     The include directory to use for the Fontconfig headers
-# ``Fontconfig_LIBRARIES``
-#     The Fontconfig libraries for linking
-# ``Fontconfig_DEFINITIONS``
-#     Compiler switches required for using Fontconfig
-# ``Fontconfig_VERSION``
-#     The version of Fontconfig that has been found
-#
-# If ``Fontconfig_FOUND`` is True, it will also define the following
-# imported target:
-#
-# ``Fontconfig::Fontconfig``
-
-#=============================================================================
-# SPDX-FileCopyrightText: 2006, 2007 Laurent Montel <montel@kde.org>
-# SPDX-FileCopyrightText: 2018 Volker Krause <vkrause@kde.org>
-#
-# SPDX-License-Identifier: BSD-3-Clause
-#=============================================================================
-
-# use pkg-config to get the directories and then use these values
-# in the FIND_PATH() and FIND_LIBRARY() calls
-find_package(PkgConfig)
-pkg_check_modules(PC_FONTCONFIG QUIET fontconfig)
-
-set(Fontconfig_DEFINITIONS ${PC_FONTCONFIG_CFLAGS_OTHER})
-
-find_path(Fontconfig_INCLUDE_DIRS fontconfig/fontconfig.h
-  PATHS
-  ${PC_FONTCONFIG_INCLUDE_DIRS}
-  /usr/X11/include
-)
-
-find_library(Fontconfig_LIBRARIES NAMES fontconfig
-  PATHS
-  ${PC_FONTCONFIG_LIBRARY_DIRS}
-)
-
-set(Fontconfig_VERSION ${PC_FONTCONFIG_VERSION})
-if (NOT Fontconfig_VERSION)
-  find_file(Fontconfig_VERSION_HEADER
-    NAMES "fontconfig/fontconfig.h"
-    HINTS ${Fontconfig_INCLUDE_DIRS}
-  )
-  mark_as_advanced(Fontconfig_VERSION_HEADER)
-  if (Fontconfig_VERSION_HEADER)
-    file(READ ${Fontconfig_VERSION_HEADER} _fontconfig_version_header_content)
-    string(REGEX MATCH "#define FC_MAJOR[ \t]+[0-9]+" Fontconfig_MAJOR_VERSION_MATCH ${_fontconfig_version_header_content})
-    string(REGEX MATCH "#define FC_MINOR[ \t]+[0-9]+" Fontconfig_MINOR_VERSION_MATCH ${_fontconfig_version_header_content})
-    string(REGEX MATCH "#define FC_REVISION[ \t]+[0-9]+" Fontconfig_PATCH_VERSION_MATCH ${_fontconfig_version_header_content})
-    string(REGEX REPLACE ".*FC_MAJOR[ \t]+(.*)" "\\1" Fontconfig_MAJOR_VERSION ${Fontconfig_MAJOR_VERSION_MATCH})
-    string(REGEX REPLACE ".*FC_MINOR[ \t]+(.*)" "\\1" Fontconfig_MINOR_VERSION ${Fontconfig_MINOR_VERSION_MATCH})
-    string(REGEX REPLACE ".*FC_REVISION[ \t]+(.*)" "\\1" Fontconfig_PATCH_VERSION ${Fontconfig_PATCH_VERSION_MATCH})
-    set(Fontconfig_VERSION "${Fontconfig_MAJOR_VERSION}.${Fontconfig_MINOR_VERSION}.${Fontconfig_PATCH_VERSION}")
-  endif()
-endif()
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(Fontconfig
-  FOUND_VAR Fontconfig_FOUND
-  REQUIRED_VARS Fontconfig_LIBRARIES Fontconfig_INCLUDE_DIRS
-  VERSION_VAR Fontconfig_VERSION
-)
-mark_as_advanced(Fontconfig_LIBRARIES Fontconfig_INCLUDE_DIRS)
-
-if(Fontconfig_FOUND AND NOT TARGET Fontconfig::Fontconfig)
-  add_library(Fontconfig::Fontconfig UNKNOWN IMPORTED)
-  set_target_properties(Fontconfig::Fontconfig PROPERTIES
-    IMPORTED_LOCATION "${Fontconfig_LIBRARIES}"
-    INTERFACE_INCLUDE_DIRECTORIES "${Fontconfig_INCLUDE_DIRS}"
-    INTERFACE_COMPILER_DEFINITIONS "${Fontconfig_DEFINITIONS}"
-  )
-endif()
-
-include(FeatureSummary)
-set_package_properties(Fontconfig PROPERTIES
-  URL "https://www.fontconfig.org/"
-  DESCRIPTION "Fontconfig is a library for configuring and customizing font access"
-)