Remove GLShader_depthReduction::SetShaderProgramUniforms

This shader has hard-coded texture unit bindings in the GLSL, so setting
uniforms has no effect.

Author: slipher

src/engine/renderer/Material.cpp

@@ -1526,6 +1526,7 @@ void MaterialSystem::DepthReduction() {
 	uint32_t globalWorkgroupX = ( width + 7 ) / 8;
 	uint32_t globalWorkgroupY = ( height + 7 ) / 8;
 
+	// FIXME: u_DepthMap object on the shader is not actually used
 	GL_Bind( tr.currentDepthImage );
 	glBindImageTexture( 2, depthImage->texnum, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32F );
 

src/engine/renderer/gl_shader.cpp

@@ -2968,10 +2968,6 @@ GLShader_depthReduction::GLShader_depthReduction() :
 	u_InitialDepthLevel( this ) {
 }
 
-void GLShader_depthReduction::SetShaderProgramUniforms( ShaderProgramDescriptor* shaderProgram ) {
-	glUniform1i( glGetUniformLocation( shaderProgram->id, "u_DepthMap" ), 0 );
-}
-
 GLShader_clearSurfaces::GLShader_clearSurfaces() :
 	GLShader( "clearSurfaces",
 		false, "clearSurfaces" ),

src/engine/renderer/gl_shader.h

@@ -3769,7 +3769,6 @@ class GLShader_depthReduction :
 	public u_InitialDepthLevel {
 	public:
 	GLShader_depthReduction();
-	void SetShaderProgramUniforms( ShaderProgramDescriptor* shaderProgram ) override;
 };
 
 class GLShader_clearSurfaces :