build: remove special freetype check

Since 52ccc4a0 was merged, it's pointless to keep our special version.

configure

@@ -1354,26 +1354,6 @@ require_pkg_config(){
     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
 }
 
-require_libfreetype(){
-    log require_libfreetype "$@"
-    pkg="freetype2"
-    check_cmd $pkg_config --exists --print-errors $pkg \
-      || die "ERROR: $pkg not found"
-    pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
-    pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
-    {
-        echo "#include <ft2build.h>"
-        echo "#include FT_FREETYPE_H"
-        echo "long check_func(void) { return (long) FT_Init_FreeType; }"
-        echo "int main(void) { return 0; }"
-    } | check_ld "cc" $pkg_cflags $pkg_libs \
-      && set_safe "${pkg}_cflags" $pkg_cflags \
-      && set_safe "${pkg}_libs"   $pkg_libs \
-      || die "ERROR: $pkg not found"
-    add_cflags    $(get_safe "${pkg}_cflags")
-    add_extralibs $(get_safe "${pkg}_libs")
-}
-
 hostcc_e(){
     eval printf '%s\\n' $HOSTCC_E
 }
@@ -5780,7 +5760,7 @@ flite_libs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_c
 enabled libflite          && require libflite "flite/flite.h" flite_init $flite_libs
 enabled fontconfig        && enable libfontconfig
 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
-enabled libfreetype       && require_libfreetype
+enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
 enabled libfribidi        && require_pkg_config fribidi fribidi.h fribidi_version_info
 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do