Deprecate pkgconfig.py (#4383)

Author: sauwming

aconfigure

@@ -5395,7 +5395,7 @@ then :
 
 fi
 
-for ac_prog in $host_cpu-$host_os-pkg-config $host-pkg-config pkg-config "python pkgconfig.py"
+for ac_prog in $host_cpu-$host_os-pkg-config $host-pkg-config pkg-config
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2

aconfigure.ac

@@ -115,7 +115,7 @@ AC_CHECK_LIB(winmm,puts)
 AC_CHECK_LIB(socket,puts)
 AC_CHECK_LIB(rt,puts)
 AC_CHECK_LIB(m,sin)
-AC_CHECK_PROGS(PKG_CONFIG,$host_cpu-$host_os-pkg-config $host-pkg-config pkg-config "python pkgconfig.py",none)
+AC_CHECK_PROGS(PKG_CONFIG,$host_cpu-$host_os-pkg-config $host-pkg-config pkg-config,none)
 
 dnl
 dnl libuuid