removed opacity node

This node has been superseded by the math node since it essentially functions
as a multiply.

app/node/factory.cpp

@@ -48,7 +48,6 @@ void NodeFactory::Initialize()
   }
 
   library_.append(new ExternalNode(":/shaders/blur.xml"));
-  library_.append(new ExternalNode(":/shaders/opacity.xml"));
   library_.append(new ExternalNode(":/shaders/solid.xml"));
   library_.append(new ExternalNode(":/shaders/stroke.xml"));
   library_.append(new ExternalNode(":/shaders/alphaover.xml"));

app/shaders/opacity.frag

@@ -1,10 +0,0 @@
-#version 110
-
-varying vec2 ove_texcoord;
-
-uniform sampler2D tex_in;
-uniform float opacity_in;
-
-void main(void) {
-  gl_FragColor = texture2D(tex_in, ove_texcoord) * (opacity_in);
-}

app/shaders/opacity.xml

@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<effect id="org.olivevideoeditor.Olive.opacity">
-    <!-- Effect Name -->
-    <name lang="en_US">Opacity</name>
-    
-    <!-- Effect Category -->
-    <category lang="en_US">Color</category>
-    <category lang="en_GB">Colour</category>
-
-    <!-- Effect Description -->
-    <description lang="en_US">
-        Adjust an image's opacity (transparency).
-    </description>
-
-    <!-- Parameter: Texture Input -->
-    <param id="tex_in" type="texture">
-        <name lang="en_US">Texture</name>
-    </param>
-
-    <!-- Parameter: Opacity Value -->
-    <param id="opacity_in" type="float">
-        <name lang="en_US">Opacity</name>
-        <min>0</min>
-        <max>1</max>
-        <view>percent</view>
-        <default>1</default>
-    </param>
-
-    <!-- Qt Resource path to fragment shader -->
-    <fragment url=":/shaders/opacity.frag" />
-</effect>

app/shaders/shaders.qrc

@@ -12,8 +12,6 @@
         <file>dropshadow.xml</file>
         <file>diptoblack.frag</file>
         <file>diptoblack.xml</file>
-        <file>opacity.frag</file>
-        <file>opacity.xml</file>
         <file>solid.frag</file>
         <file>solid.xml</file>
         <file>stroke.frag</file>