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/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 :