glsl: Remove long unused 'configure.ac' file.

This was from way back when glsl2 lived in its own repository.

src/glsl/configure.ac

@@ -1,69 +0,0 @@
-#                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
-AC_PREREQ(2.61)
-AC_INIT(glsl, XXXXX, idr@freedesktop.org, glsl)
-AC_CONFIG_SRCDIR([Makefile.am])
-AM_CONFIG_HEADER([config.h])
-AC_CONFIG_FILES([glcpp/Makefile])
-
-AM_INIT_AUTOMAKE
-LT_INIT
-
-AM_MAINTAINER_MODE
-
-# Checks for programs.
-AC_PROG_CXX
-AC_PROG_CC
-AC_PROG_MAKE_SET
-AC_PROG_YACC
-AC_PROG_LEX
-
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
-
-# Checks for libraries.
-
-# Checks for header files.
-
-# Checks for typedefs, structures, and compiler characteristics.
-
-# Checks for library functions.
-AC_HEADER_STDC
-
-AH_TOP([#ifndef GLSL_CONFIG_H
-#define GLSL_CONFIG_H])
-AH_BOTTOM([#endif /* GLSL_CONFIG_H */])
-
-PKG_CHECK_MODULES([talloc], [talloc >= 2.0])
-
-AC_ARG_ENABLE([debug],
-    [AS_HELP_STRING([--enable-debug],
-        [use debug compiler flags and macros @<:@default=disabled@:>@])],
-    [enable_debug="$enableval"],
-    [enable_debug=no]
-)
-if test "x$enable_debug" = xyes; then
-    DEFINES="$DEFINES -DDEBUG"
-    if test "x$GCC" = xyes; then
-	# Remove any -g or -O flags from the command line
-	CFLAGS=[`echo $CFLAGS | sed 's/-g[^ \t]*[ \t]*//g;s/-O[^ \t]*[ \t]*//g'`]
-        CFLAGS="$CFLAGS -O0 -ggdb3 -fstack-protector -D_FORTIFY_SOURCE=2"
-    fi
-    if test "x$GXX" = xyes; then
-	# Remove any -g flags from the command line
-	CXXFLAGS=[`echo $CXXFLAGS | sed 's/-g[^ \t]*[ \t]*//g;s/-O[^ \t]*[ \t]*//g'`]
-        CXXFLAGS="$CXXFLAGS -O0 -ggdb3 -fstack-protector -D_FORTIFY_SOURCE=2"
-    fi
-fi
-
-if test "x$GXX" = xyes ; then
-	WARN="-Wall -Wextra -Wunsafe-loop-optimizations -Wstack-protector"
-else
-	WARN=""
-fi
-
-CFLAGS="$CFLAGS $WARN"
-CXXFLAGS="$CXXFLAGS $WARN"
-YFLAGS="-d -v"
-
-AC_OUTPUT([Makefile])