Remove redundant gui options from build scripts

configure.ac

@@ -105,11 +105,6 @@ AC_ARG_ENABLE(tests,
     [use_tests=$enableval],
     [use_tests=yes])
 
-AC_ARG_ENABLE(gui-tests,
-    AS_HELP_STRING([--disable-gui-tests],[do not compile GUI tests (default is to compile if GUI and tests enabled)]),
-    [use_gui_tests=$enableval],
-    [use_gui_tests=$use_tests])
-
 AC_ARG_WITH([comparison-tool],
     AS_HELP_STRING([--with-comparison-tool],[path to java comparison tool (requires --enable-tests)]),
     [use_comparison_tool=$withval],
@@ -295,7 +290,7 @@ case $host in
          dnl in expected paths because they may conflict with system files. Ask
          dnl Homebrew where each one is located, then adjust paths accordingly.
          dnl It's safe to add these paths even if the functionality is disabled by
-         dnl the user (--without-wallet or --without-gui for example).
+         dnl the user (--without-wallet for example).
 
          openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
          bdb_prefix=`$BREW --prefix berkeley-db4 2>/dev/null`
@@ -870,7 +865,7 @@ else
 fi
 
 if test x$build_bitcoin_utils$build_bitcoin_libs$build_bitcoind$use_tests = xnononono; then
-  AC_MSG_ERROR([No targets! Please specify at least one of: --with-utils --with-libs --with-daemon --with-gui or --enable-tests])
+  AC_MSG_ERROR([No targets! Please specify at least one of: --with-utils --with-libs --with-daemon or --enable-tests])
 fi
 
 AM_CONDITIONAL([TARGET_DARWIN], [test x$TARGET_OS = xdarwin])