Removed declaration of getAttachedShaders() without implementation.

Found while working on BUG=angle:751

BUG=angle:751

Change-Id: I8a5c5383f88ecb379395d1a23e36148145ebe34d
Reviewed-on: https://chromium-review.googlesource.com/224090
Tested-by: Tibor Ouden, den <tibordenouden@gmail.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libGLESv2/ProgramBinary.h b/src/libGLESv2/ProgramBinary.h
index 10fcb19..da35d4f 100644
--- a/src/libGLESv2/ProgramBinary.h
+++ b/src/libGLESv2/ProgramBinary.h
@@ -153,7 +153,6 @@
     LinkResult link(InfoLog &infoLog, const AttributeBindings &attributeBindings, Shader *fragmentShader, Shader *vertexShader,
                     const std::vector<std::string>& transformFeedbackVaryings, GLenum transformFeedbackBufferMode,
                     const Caps &caps);
-    void getAttachedShaders(GLsizei maxCount, GLsizei *count, GLuint *shaders);
 
     void getActiveAttribute(GLuint index, GLsizei bufsize, GLsizei *length, GLint *size, GLenum *type, GLchar *name) const;
     GLint getActiveAttributeCount() const;