Remove FLTK build instructions (no longer needed)


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4607 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/BUILDING.txt b/BUILDING.txt
index ac78202..de5e375 100644
--- a/BUILDING.txt
+++ b/BUILDING.txt
@@ -9,11 +9,6 @@
 
 -- CMake (http://www.cmake.org) v2.8 or later
 
--- FLTK 1.3.0
-   * Must be patched using fltk/extensions.patch (in the TigerVNC source
-     directory) to get full functionality
-   * See "Building FLTK" below.
-
 -- If building TLS support:
    * GnuTLS and its dependencies (libgcrypt, libtasn1, libgpg-error)
 
@@ -95,29 +90,6 @@
    variable prior to building TigerVNC.
 
 
-=============
-Building FLTK
-=============
-
-Currently, TigerVNC requires functionality that is not yet included in the
-upstream version of FLTK.  Thus, it will be necessary to build FLTK from
-source.  To do this:
-
-1. Download the FLTK 1.3.0 source tarball from http://www.fltk.org/
-2. Extract the source tarball
-3. cd fltk-1.3.0
-4. patch -p1 < {tigervnc_source_directory}/fltk/extensions.patch
-5. Use CMake to build FLTK using the same procedures described below for
-   building TigerVNC.  The recipes in the "Build Recipes" section also apply.
-6. (optional) Use 'make install' to install FLTK into a directory of your
-   choosing.
-7. When building TigerVNC, set the FLTK_FLUID_EXECUTABLE CMake variable to the
-   location of the fluid executable that was built in Step 5 or installed in
-   Step 6.  This gives CMake a hint as to where to find the FLTK library.
-8. If you did not install FLTK, then set the FLTK_INCLUDE_DIR CMake variable to
-   the location of the FLTK source directory.
-
-
 ==================
 Out-of-Tree Builds
 ==================