Remove the gcc compilation comments

They went out of sync some time ago, and are
no longer really required since we have them
buildable from makefile.unix

Change-Id: Ica2dcf5c55f44365598f832f55204d123d7aa601
(cherry picked from commit a4e1cdbbe8)

examples/dwebp.c

@@ -5,9 +5,7 @@
 //  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
 // -----------------------------------------------------------------------------
 //
-//  Command-line tool for decoding a WebP image
-//
-//  Compile with:     gcc -o dwebp dwebp.c -lwebpdecode
+//  Command-line tool for decoding a WebP image.
 //
 // Author: Skal (pascal.massimino@gmail.com)
 

examples/gif2webp.c

@@ -7,15 +7,6 @@
 //
 //  simple tool to convert animated GIFs to WebP
 //
-// Getting the prerequisites:
-// Debian-like linux:
-//   sudo apt-get install libgif-dev
-// MacPorts
-//   sudo port install giflib
-//
-// Compiling:
-//   gcc -o gif2webp gif2webp.c -O3 -lwebpmux -lwebp -lgif -lpthread -lm
-//
 // Authors: Skal (pascal.massimino@gmail.com)
 //          Urvang (urvang@google.com)
 

examples/vwebp.c

@@ -5,13 +5,7 @@
 //  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
 // -----------------------------------------------------------------------------
 //
-//  Simple WebP file viewer.
-//
-// Compiling on linux:
-//   sudo apt-get install freeglut3-dev mesa-common-dev
-//   gcc -o vwebp vwebp.c -O3 -lwebp -lwebpmux -lglut -lGL -lpthread -lm
-// Compiling on Mac + XCode:
-//   gcc -o vwebp vwebp.c -lwebp -lwebpmux -framework GLUT -framework OpenGL
+//  Simple OpenGL-based WebP file viewer.
 //
 // Author: Skal (pascal.massimino@gmail.com)
 

examples/webpmux.c

@@ -8,9 +8,6 @@
 //  Simple command-line to create a WebP container file and to extract or strip
 //  relevant data from the container file.
 //
-//  Compile with:     gcc -o webpmux webpmux.c -lwebpmux -lwebp
-//
-//
 // Authors: Vikas (vikaas.arora@gmail.com),
 //          Urvang (urvang@google.com)